- phenixbb - phenix-online.org

riding model and deposition
by Alex Theodossis 18 Feb '10

18 Feb '10

Dear phenixbb, I have refined a 1.3A structure using individual anisotropic B-factors (Rfactor, 15.5%; Rfree, 17.7%). Additional use of the riding model during refinement has improvement the R values (Rf, 14.5%; Rfree, 16.6%), although bond length and angle outliers did increase (anyone know why that would be?). I have decided to deposit the model obtained using the riding model, but am unsure whether to include the hydrogen coordinates in the deposition. The Phenix.refine documentation advises that they are left in, as they are needed to reproduce the refinement statistics. However, reviewing the high resolution structures in the PDB I found that: 1. In the case of structures refined using REFMAC or SHELX, the riding model does not seem to be included, although its use during refinement is mentioned in the pdb header. 2. In the case of structures refined using PHENIX, use of the riding model is sometimes indicated in the header, but hydrogen coordinates only appear to be included in the pdb in the case of structures refined to a resolution better than 1.3A. As far as I can understand the purpose of the riding model is to provide additional restraints for refinement, so as long as its use is made evident in the pdb header (and maybe the methods section of the publication) that should be enough. Inclusion of hydrogens in the model, when you can't see them seems inappropriate. Nevertheless, I would appreciate a more authoritative perspective on this issue. Thank you in advance, Alex Theodossis

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refinement error with ligand
by Christian Roth 17 Feb '10

17 Feb '10

Dear all, I started a refinement of one of my structures using the GUI of phenix (Version 1.6). I used the options of adding hydrogens and dis a suimulated annealing. I used the output file and corrected it manually using Coot. I incorporated a few Ethylenglycol Monomers which might have bound. I merged everything wrote the file out and loaded this pdb in the GUI. I got an error which might be du to the fact that I didnt specify a CIF file for the ligand. I started ready set from the GUI to check the pdb and used REEL to create a CIF File. I added the CIF-File to the File list and tried to start again phenix.refine using the hydrogen option but no sim. annealing. However I got always the following error log: # Date 2010-02-17 Time 12:00:35 CET +0100 (1266404435.31 s) #phil __OFF__ Command line arguments: "/homes/roth/clcf/049b32mlsyncref/phenix/phenix/project_data/refine_15.eff" "-- overwrite" HOST = bbzws339 HOSTTYPE = i486-linux VENDOR = intel USER = roth PID = 29983 ------------------------------------------------------------------------------- PHENIX: Python-based Hierarchical ENvironment for Integrated Xtallography Version: 1.6 Release tag: 289 Platform: intel-linux-2.6 linux User: roth ------------------------------------------------------------------------------- phenix.refine: Macromolecular Structure Refinement Monomer Library directory: "/software/linuxsoft/phenix-1.6-289/chem_data/mon_lib" Total number of atoms: 16881 Number of models: 1 Model: "" Number of chains: 19 Chain: "A" Number of atoms: 1575 Number of conformers: 1 Conformer: "" Number of residues, atoms: 94, 1575 Classifications: {'peptide': 94} Modifications used: {'COO': 1, 'NH3': 1} Link IDs: {'PTRANS': 6, 'TRANS': 87} and so on for other chains Chain: "R" Number of atoms: 7 Number of conformers: 1 Conformer: "" Number of residues, atoms: 1, 7 Unusual residues: {'EDO': 1} Unexpected atoms: {'EDO,HO1': 1, 'EDO,HO2': 1} Classifications: {'undetermined': 1} Number of atoms with unknown nonbonded energy type symbols: 16 "HETATM16821 HO2 EDO K 1 .*. H " "HETATM16826 HO1 EDO K 1 .*. H " "HETATM16828 HO2 EDO L 1 .*. H " "HETATM16834 HO1 EDO L 1 .*. H " "HETATM16836 HO2 EDO M 1 .*. H " "HETATM16840 HO1 EDO M 1 .*. H " "HETATM16842 HO2 EDO N 1 .*. H " "HETATM16848 HO1 EDO N 1 .*. H " "HETATM16850 HO2 EDO O 1 .*. H " "HETATM16857 HO1 EDO O 1 .*. H " ... (remaining 6 not shown) I looked in the pdb for this atoms, but I cannot find them. When I use a cif file created directly by phenix elbow using command line and when I did not use the update hydrogen button the refinement works. But the new residues as well as the EDO molecules have no hydrogens in riding positions. Do I have to remove all hydrogens and attach them again for every cycle? One Refinement runs for more then 5 hours regardless I use sim annealing or not. This seems to be very long for me. Maybe I want too many optimization steps? Could anyone explain me what goes wrong here. I am no so much experienced with phenix and now I run out of ideas. Thanks in advance Christian

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phenix.elbow and compound refinement
by YS. Chung 17 Feb '10

17 Feb '10

Dear all, I am having some difficulties in refining my compound within my structure. I was able to create the compound and the cif file using PRODRG and was able to fit it in coot perfectly fine. However, as pointed out by many users of phenix.refine, the cif file from PRODRG does not work well with phenix.refine. I have created a cif file using phenix.elbow and the refinement itself works fine. However, when I try to use the cif file from phenix elbow in coot, it pulls apart my compound and it's extremely difficult to work with. This still happens when I create the cif file using the --final_geometry option. Is there a way around this or is there something I can do? Any help will be much appreciated. Thank you, Yu Seon Chung

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refinement at 4.4 A => side chains or not
by jonathan elegheert 12 Feb '10

12 Feb '10

Dear bb, could anyone please share his/her opinion on following matter; I am refining a 4.4 A protein complex structure which I could solve using MR with the high resolution models of the separate components. I also have another 3.5 A crystal form of the complex. My question is whether or not to rebuild/leave "positionally known" side chains in the 4.4 A structure, because of course 2/3 of the time there is of course no density for it. However, a review of the PDB learnes that almost all models deposited between 4 and 5 A contain full side chains! Personally my opinion is not to include them because a model should be a representation of the information content of the experiment and thus density, but maybe that deviates from the consensus. On a more technical note: until now the trimming procedure has only sporadically led to Fo-Fc 'blobs' in the hydrophobic protein interior; are there proven modifications one has to apply to the bulk solvent model mask to avoid these even more? Thanks a lot for your insights, Jonathan -- Jonathan Elegheert Ph.D. Student Unit for Structural Biology& Biophysics http://www.lprobe.ugent.be/xray.html Lab for Protein Biochemistry and Biomolecular Engineering Department of Biochemistry& Microbiology Ghent University, Belgium e-mail: jonathan.elegheert(a)ugent.be

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multiple model refinement
by chene＠umbi.umd.edu 12 Feb '10

12 Feb '10

Hi, PHENIX users, Does anyone know if multiple model refinement is implemented in the latest version? I am using version 1.3. It was not implemented yet in that version. Thanks Chen Chen Chen, PhD, Research Associate Center for Advanced Research in Biotechnology (CARB), University of Maryland Biotechnology Institute (UMBI), 9600 Gudelsky Drive, Rockville, MD 20850 240-314-6122

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iMosflm .mtz
by anon 11 Feb '10

11 Feb '10

Hi, i was under the impression Phenix (AutoSol) could handle .mtz files from iMosflm, however when i input the .mtz file into AutoSol, no labels appears in the pull-down menu, and pressing Run results in a dialogue box appearing stating you must select a column label for the reflection file, if no labels are present it may not be a valid format. If i input the iMosflm .mtz file into phenix.reflection_file_editor, and copy over the I, SIGI, M_ISYM columns, i get the following error; A Python error was detected. This is probably a bug; click "OK" to send a bug report to the PHENIX developers. TypeError : not all arguments converted during string formatting Traceback (most recent call last): File "/usr/local/phenix-1.6-289/phenix/wxGUI2/MainWindow.py", line 880, in OnRun self.run() File "/usr/local/phenix-1.6-289/phenix/wxGUI2/Programs/ HKLTools.py", line 81, in run symmetry_callback=None) # TODO File "/usr/local/phenix-1.6-289/cctbx_project/iotbx/ reflection_file_editor.py", line 358, in __init__ "related reflections are not identical.)" % array_name) TypeError: not all arguments converted during string formatting When i use the scaled .mtz file produced by scala, AutoSol works fine. Just wondering what's going on! Also, how do you delete individual Jobs in the Job History window (ie jobs that have failed or you no longer want to keep etc) Thanks for the help

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phenix.refine frozen
by Roberto Steiner 11 Feb '10

11 Feb '10

Hi there, I would appreciate some feedback on the following: I am playing around with phenix.refine which comes with Phenix distro 1.6-289 for Mac-Intel. When running a normal refinement job (ind site + grouped ADPs + ncs+TorsionSimulatedAnnealing) phenix.refine gets stuck after bulk solvent modelling and scaling. The last things I see in the log page are: ====================== bulk solvent modeling and scaling ====================== |--(resolution: 3.50 - 58.55 A; n_refl. = 55140)------------------------------| | | | r_work= 0.2687 r_free= 0.2800 ksol= 0.38 Bsol= 10.09 scale= 1.148 | | | | overall anisotropic scale matrix (Cartesian basis; B11,B22,B33,B12,B13,B23):| | (-2.67,-2.67,5.34,0.00,0.00,-0.00); trace/3= 0.00 | | | | maximum likelihood estimate for coordinate error: 0.41 A | | x-ray target function (ml) for work reflections: 7.216427 | | -----------------------------------------------------------------------------| ========================== Target weights: x-ray data ========================= and that's it. For completeness, I must report that I changed the defaults of wxc_scale and wxu_scale (but surely that cannot be the problem...). Switching off the TorsionSimAnnealing does not help. Additionally, if I click on the abort button on the bottom-left of the page nothing happens. On the other hand if I click on the abort icon at the top of the page I get the message "You are not currently running any calculations. Do you want to close this window?" If I say Ok the following message appears: "There is at least one process running; are you sure you want to exit before it is finished" Other tasks (phenix.xtriage for example) seem to run fine. Any suggestion? Best Roberto

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phenix.model_vs_data or something else for 'most disagreeable reflections' ?
by Francis E Reyes 11 Feb '10

11 Feb '10

Hi phenixer's I'm looking for a utility that'll calculate Fc given a refined model and compare it to Fo not on a global scale, but on an individual reflection scale. ShelX does this a reflection list of 'most disagreeable reflections'. Is this possible in phenix? Or another utility (besides shelx)? thanks FR --------------------------------------------- Francis Reyes M.Sc. 215 UCB University of Colorado at Boulder gpg --keyserver pgp.mit.edu --recv-keys 67BA8D5D 8AE2 F2F4 90F7 9640 28BC 686F 78FD 6669 67BA 8D5D

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Re: [phenixbb] Omit map Problem
by Carruthers, Carl W. 10 Feb '10

10 Feb '10

Coot works fine. When I click the GUI button after the run, it loads the pdb file that I used as a start model and nothing else. When I try opening the composite map manually (using coot: "open mtz", "auto open mtz" or even "open map" ) it says at the bottom "read map /file path/ resolve_composite_map.mtz failed." Thanks again! Carl Methodist. Leading Medicine. Recognized by U.S.News & World Report as an "Honor Roll" hospital Named to FORTUNE magazine's "100 Best Companies to Work For" list five years in a row Designated as a Magnet hospital for excellence in nursing Visit us at methodisthealth.com Follow us at twitter.com/MethodistHosp and www.facebook.com/methodisthospital ***CONFIDENTIALITY NOTICE*** This e-mail is the property of The Methodist Hospital and/or its relevant affiliates and may contain restricted and privileged material for the sole use of the intended recipient(s). Any review, use, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive for the recipient), please contact the sender and delete all copies of the message. Thank you.

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Omit map Problem
by Carruthers, Carl W. 10 Feb '10

10 Feb '10

When making an composite omit map in Phenix 1.6 GUI, the final "resolve_composite_map.mtz" file won't load in coot or pymol. When I click the little magnifying glass on the Summary page, Phenix states that it can't find the file, even though I can see it when using Finder (Mac OS). The final lines of the run status are below: Putting all omit results in AutoBuild_run_61_/OMIT OMIT results in AutoBuild_run_61_/OMIT : ['overall_best.pdb_OMIT_REGION_1', 'overall_best.pdb_OMIT_REGION_10', 'overall_best.pdb_OMIT_REGION_11', 'overall_best.pdb_OMIT_REGION_12', 'overall_best.pdb_OMIT_REGION_2', 'overall_best.pdb_OMIT_REGION_3', 'overall_best.pdb_OMIT_REGION_4', 'overall_best.pdb_OMIT_REGION_5', 'overall_best.pdb_OMIT_REGION_6', 'overall_best.pdb_OMIT_REGION_7', 'overall_best.pdb_OMIT_REGION_8', 'overall_best.pdb_OMIT_REGION_9', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_1', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_10', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_11', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_12', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_2', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_3', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_4', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_5', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_6', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_7', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_8', 'overall_best_denmod_map_coeffs.mtz_OMIT_REGION_9', 'resolve_composite_map.mtz'] Combining all 12 omit regions in AutoBuild_run_61_/OMIT No background map in composite map Composite omit result is in /Users/carlcarruthers/Crystallography/AutoBuild_run_61_/OMIT/resolve_composite_map.mtz Possible operation: finished Required antecedents: [] Expected results: [] Application method: finished Yes, have antecedents... Resulting expectation:10000.0 Am I doing something wrong? Is it a bug? Thanks for helping a crystallogaophy newb (this is my first model!)... Carl Methodist. Leading Medicine. Recognized by U.S.News & World Report as an "Honor Roll" hospital Named to FORTUNE magazine's "100 Best Companies to Work For" list five years in a row Designated as a Magnet hospital for excellence in nursing Visit us at methodisthealth.com Follow us at twitter.com/MethodistHosp and www.facebook.com/methodisthospital ***CONFIDENTIALITY NOTICE*** This e-mail is the property of The Methodist Hospital and/or its relevant affiliates and may contain restricted and privileged material for the sole use of the intended recipient(s). Any review, use, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive for the recipient), please contact the sender and delete all copies of the message. Thank you.

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phenix.maps: a command line tool to compute various maps
by Pavel Afonine 05 Feb '10

05 Feb '10

Starting PHENIX nightly build version 1.6-295 (or whatever next version), the new command line tool phenix.maps is available. As the name suggests, this is the tool for map calculation: regular (p*Fobs-q*Fcalc) or maximum-likelihood (p*mFobs-q*DFcalc), with any user-defined coefficients p and q, as many as requested. For example, 2mFo-DFc, 3Fo-2Fc, mFo-DFc, Fc, Fo, Anomalous difference maps can be all computed at once. Also, a user has a full control over various map calculation parameters, such as filling missing Fobs with DFc, computing kick maps, etc. Maps can be output in X-plor formatted files or as Fourier map coefficients in MTZ formatted file. X-plor formatted maps can be computed for the whole molecule/unit cell or any selected part of the structure. This new tool is meant to be a replacement for current practice of computing the maps using phenix.refine (although, phenix.refine still output maps as before). For more information and usage examples simply run phenix.maps . This is available from PHENIX GUI too (thanks Nathaniel Echols). For usage instructions and quick manual type phenix.maps and hit Enter. Please let me know should any questions or problems related to using this tool arise. Pavel. P.S. Below is the result of running phenix.maps: phenix.maps: a command line tool to compute various maps. How to run: 1. Run phenix.maps without any arguments: just type phenix.maps in the command line and hit Enter. This will create a parameter file called maps.params, which can be renamed if desired. 2. Edit maps.params file to specify input/output files and the desired maps. It is possible to request as many maps as desired. 3. Run this command to compute requested maps: phenix.maps maps.params Remarks: - The scope of parameters 'map_coefficients' defines the map that will be output as Fourier map coefficients. The scope of parameters 'map' defines the map that will be output as X-plor formatted map. - To create several maps: duplicate either 'map_coefficients' or 'map' or both scopes of parameters as many times as many maps is desired. Then edit each of them to define the maps. - A map is defined by specifying a map type using 'map_type' keyword available within each scope of parameters: 'map_coefficients' or 'map'. The general supported format for 'map_type' is: [p][m]Fo+[q][D]Fc[kick][filled]. For example: 2Fo-Fc, 2mFobs-DFcalc, 3Fobs-2Fmodel, Fo-Fc, mfobs-Dfcalc, anom. The 'map_type' parser will automatically recognize which map is requested. - The program creates as many files with X-plor formatted maps as many X-plor formatted maps is requested, and it creates only one MTZ formatted file with all Fourier map coefficients in it. - The X-plor formatted map can be computed in the entire unit cell or around selected atoms only. - Kick maps and missing Fobs filling is done (if requested) as described in Adams et al. (2010). Acta Cryst. D66, 213-221. - Twinning (if detected) will be accounted for automatically. - All arrays used in map calculation, for example: Fobs, Fmodel, Fcalc, Fmask, m, D, etc., can be output into a CNS or MTZ formatted reflection file.

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Completeness issue by phenix - revisited
by J. Fleming 04 Feb '10

04 Feb '10

Hi, I'm having a problem using phenix.refine with my x-ray data. My completeness is always 89% when it should be 99%. My data was originally processed with CCP4i. I found an old post (see below) with a potential fix that doesn't work for me. I've tried changing the 'Anomalous flag: True' to 'Anomalous flag: False' but my completeness is still 89%. I've clicked through a variety of other setting in the GUI that I thought would help but no luck. Does anyone have any ideas? Thanks in advance, Jon ----- Original Message ----- From: "Ralf W. Grosse-Kunstleve" <rwgk at cci.lbl.gov <http://www.phenix-online.org/mailman/listinfo/phenixbb>> To: phenixbb at phenix-online.org <http://www.phenix-online.org/mailman/listinfo/phenixbb> Sent: Monday, December 15, 2008 12:59:12 PM GMT -05:00 US/Canada Eastern Subject: Re: [phenixbb] Completeness issue by phenix Hi YoungJin, I suspect phenix.refine decided your mtz file contains anomalous data when you actually have non-anomalous data. Could you look in the phenix.refine output for something like this: ================================== X-ray data ================================= F-obs: 1yjp.mtz:FOBS_X,SIGFOBS_X R-free flags: 1yjp.mtz:R-free-flags Miller array info: 1yjp.mtz:FOBS_X,SIGFOBS_X Observation type: xray.amplitude Type of data: double, size=495 Type of sigmas: double, size=495 Number of Miller indices: 495 Anomalous flag: False ^^^^^ in particular here If you see "Anomalous flag: True" try adding this to the phenix.refine command line: xray_data.force_anomalous_flag_to_be_equal_to=False Let me know if this doesn't help. If it does help, I'd be interested to know how the .mtz file was generated. Ralf

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BEAM TIME AVAILABLE FOR MACROMOLECULAR CRYSTALLOGRAPHY
by Cyndi Salbego 02 Feb '10

02 Feb '10

BEAM TIME AVAILABLE FOR MACROMOLECULAR CRYSTALLOGRAPHY AT THE TWO ID BEAMLINES OF NE-CAT AT APS. Beamline 24ID-C: Equipped with MD2 microdiffractometer, tunable between 6-21KeV, ADSC Q315 Detector, MAD Capable. Outfitted with ALS-style robot that can use ALS pucks or Unipucks. Beamline 24ID-E: Equipped with MD2 microdiffractometer, delivering beam as small as 5 microns. Single energy (12662eV) optimized for Se-SAD experiments, ADSC Q315 Detector. Outfitted with ALS-style robot that can use ALS pucks or Unipucks. For more information on our beamlines (beamline and robot manuals) along with updated schedule availability please see: http://necat.chem.cornell.edu or contact Cyndi Salbego (csalbego(a)anl.gov) for further information. To apply for General User Time (Rapid Access for current run cycle) please follow this link: https://beam.aps.anl.gov/pls/apsweb/gup0005.start_page Cyndi Salbego Administrator, NECAT 630.252.0689

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AUTOSOL for MAD data with error message-'Need a symfile for solve'
by m.b.rajasekaran＠reading.ac.uk 02 Feb '10

02 Feb '10

Dear all, I have a query regarding the Autosol option in the PHENIX-1.6-289 version. We are trying to process a MAD data for a zinc bound protein crystal with AuTOSOL. We uploaded the scaled files, sequence and all other details and started running AUTOSOL. But the program stopped with the following error message pasted below mentioning some missing of symfile. We were not able to locate any parameters file on the installation directory. It would be helpful if we get some useful suggestions on this. Thanks in advance, Mohan *********************************************************** PHENIX AutoSol Tue Feb 2 12:37:41 2010 ************************************************************ Working directory: /home/sar06mbr/30JanDiamondI02/107/107_php22121 PHENIX VERSION: 1.6 of 29-01-2010 PHENIX RELEASE_TAG : 289 PHENIX MTYPE : intel-linux-2.6 PHENIX MVERSION : suse AutoSol_start AutoSol Run 2 Tue Feb 2 12:37:41 2010 INPUT FILE LIST: ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz', '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz', '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_4_P22121_scala2.mtz'] Copied /home/sar06mbr/30JanDiamondI02/107/107_php22121/result.seq to /home/sar06mbr/30JanDiamondI02/107/107_php22121/AutoSol_run_2_/sequence_autosol.dat Setting chain_type to PROTEIN Setting defaults for data_quality moderate Setting thorough_denmod to Yes Settin fix_xyz_after_denmod to False Setting max_ha_iterations to 2 Setting fixscattfactors to No Settin defaults for thoroughness quick Setting best_of_n_hyss_always to 1 Setting max_extra_unique_solutions to 0 Settin ha_iteration to No Setting max_choices to 1 Setting number_of_models to 1 Setting number_of_builds to 1 Setting test_mask_type to No Setting n_cycle_build to 0 Setting thorough_loop_fit to Setting create_scoring_table to No Not truncating ha sites at start of resolve as this is not PHASER SAD phasing Trying to guess refinement file for later use from ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz', '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz', '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_4_P22121_scala2.mtz'] Choosing guess of refinement file for later use from all files: ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz', '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz', '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_4_P22121_scala2.mtz'] FILE TYPE ccp4_mtz COLUMN LABELS: ['H', 'K', 'L', 'FreeR_flag', 'F_107_2re', 'SIGF_107_2re', 'F_107_2re(+)', 'SIGF_107_2re(+)', 'F_107_2re(-)', 'SIGF_107_2re(-)', 'DANO_107_2re', 'SIGDANO_107_2re', 'IMEAN_107_2re', 'SIGIMEAN_107_2re', 'I_107_2re(+)', 'SIGI_107_2re(+)', 'I_107_2re(-)', 'SIGI_107_2re(-)'] GUESS FILE TYPE MERGE TYPE mtz premerged TARGET LABELS ['F1', 'SIGF1', 'DANO1', 'SIGDANO1'] Unit cell: (34.79, 108.92, 134.88, 90, 90, 90) Space group: P 2 21 21 (No. 18) CONTENTS: ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz', 'mtz', 'premerged', 'P 2 21 21', [34.790000915527344, 108.92009735107422, 134.8800048828125, 90.0, 90.0, 90.0], 2.4890566908055836, ['F1', 'SIGF1', 'DANO1', 'SIGDANO1']] File /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz RES: 2.5 FILE TYPE ccp4_mtz COLUMN LABELS: ['H', 'K', 'L', 'FreeR_flag', 'F_107_3re', 'SIGF_107_3re', 'F_107_3re(+)', 'SIGF_107_3re(+)', 'F_107_3re(-)', 'SIGF_107_3re(-)', 'DANO_107_3re', 'SIGDANO_107_3re', 'IMEAN_107_3re', 'SIGIMEAN_107_3re', 'I_107_3re(+)', 'SIGI_107_3re(+)', 'I_107_3re(-)', 'SIGI_107_3re(-)'] GUESS FILE TYPE MERGE TYPE mtz premerged TARGET LABELS ['F1', 'SIGF1', 'DANO1', 'SIGDANO1'] Unit cell: (34.85, 109.18, 135.27, 90, 90, 90) Space group: P 2 21 21 (No. 18) CONTENTS: ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz', 'mtz', 'premerged', 'P 2 21 21', [34.849998474121094, 109.18000030517578, 135.26980590820312, 90.0, 90.0, 90.0], 2.4889952912293629, ['F1', 'SIGF1', 'DANO1', 'SIGDANO1']] File /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz RES: 2.5 FILE TYPE ccp4_mtz COLUMN LABELS: ['H', 'K', 'L', 'FreeR_flag', 'F_107_4re', 'SIGF_107_4re', 'F_107_4re(+)', 'SIGF_107_4re(+)', 'F_107_4re(-)', 'SIGF_107_4re(-)', 'DANO_107_4re', 'SIGDANO_107_4re', 'IMEAN_107_4re', 'SIGIMEAN_107_4re', 'I_107_4re(+)', 'SIGI_107_4re(+)', 'I_107_4re(-)', 'SIGI_107_4re(-)'] GUESS FIL TARGET LABELS ['F1', 'SIGF1', 'DANO1', 'SIGDANO1'] Unit cell: (34.87, 109.2, 135.33, 90, 90, 90) Space group: P 2 21 21 (No. 18) CONTENTS: ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_4_P22121_scala2.mtz', 'mtz', 'premerged', 'P 2 21 21', [34.869998931884766, 109.19999694824219, 135.32989501953125, 90.0, 90.0, 90.0], 2.4890134311310943, ['F1', 'SIGF1', 'DANO1', 'SIGDANO1']] File /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_4_P22121_scala2.mtz RES: 2.5 Guess of datafile for refinement: /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz Using /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz for refinement Specify input_refinement_file=/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz to change this HKLIN ENTRY: /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz FILE TYPE ccp4_mtz COLUMN LABELS: ['H', 'K', 'L', 'FreeR_flag', 'F_107_2re', 'SIGF_107_2re', 'F_107_2re(+)', 'SIGF_107_2re(+)', 'F_107_2re(-)', 'SIGF_107_2re(-)', 'DANO_107_2re', 'SIGDANO_107_2re', 'IMEAN_107_2re', 'SIGIMEAN_107_2re', 'I_107_2re(+)', 'SIGI_107_2re(+)', 'I_107_2re(-)', 'SIGI_107_2re(-)'] GUESS FILE TYPE MERGE TYPE mtz premerged TARGET LABELS ['F1', 'SIGF1', 'DANO1', 'SIGDANO1'] Unit cell: (34.79, 108.92, 134.88, 90, 90, 90) Space group: P 2 21 21 (No. 18) CONTENTS: ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz', 'mtz', 'premerged', 'P 2 21 21', [34.790000915527344, 108.92009735107422, 134.8800048828125, 90.0, 90.0, 90.0], 2.4890566908055836, ['F1', 'SIGF1', 'DANO1', 'SIGDANO1']] Inverse hand of space group: P 2 21 21 Creating sg entry from /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz Unit cell: (34.79, 108.92, 134.88, 90, 90, 90) Space group: P 2 21 21 (No. 18) Space group name is: P 2 21 21 symbol is: p22121 **************************************** AutoSol Input failed Need a symfile for solve ****************************************

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automatically changed refinement parameters
by Sara Züger 02 Feb '10

02 Feb '10

Dear phenixbb, I have some questions regarding refinement parameters: When I run phenix v1.6 via the GUI, starting a fresh refinement session from the main window (I do TLS+isotropic ADP refinement and 5 macrocycles, otherwise everything default), I saw these non-default refinement settings in the run, which I did not specify myself, but the program: adp_restraints { iso { use_u_local_only = True sphere_radius = 1.55 distance_power = 0 average_power = 0 }} In the documentation I found that when doing TLS+isotropic ADP refinement, only Ulocal is restrained, so the first command makes sense. But how is it with the sphere_radius, distance_power and average_power? The default parameters are sphere_radius= 5.0 distance_power= 1.69 average_power= 1.03 What do these parameters mean? What does it mean when these parameters have changed (and why did they change)? And is it ok at all that they changed? And would they have an influence if I modify the start model by setting b_iso to a certain value and then refine "normally" with TLS+isotropic? Another parameter that changed and I did not specify is: Target_weights { wxu_scale = 2.72 } Why did this happen, is it because few cycles before I included optimize_weights? And why would this change the weights permanently? Does it make sense? Thank you for explaining me these things! Sara

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Re: [phenixbb] AUTOSOL for MAD data with error message-'Need a symfile for solve'
by Thomas C. Terwilliger 02 Feb '10

02 Feb '10

Dear Mohan, I'm sorry for the trouble! I have not seen this one, but it must be a bug that I need to fix. Can you possibly send me the data file and exact command used (you can just send data to low-res such as 6 A if you like) and I will fix it? In the meantime...if you split your dataset up into individual files I would expect that to work, particularly if you convert to .sca. All the best, Tom T > >> >> Dear all, >> I have a query regarding the Autosol option in the >> PHENIX-1.6-289 version. We are trying to process a MAD data for a zinc >> bound protein crystal with AuTOSOL. We uploaded the scaled files, sequence >> and all other details and started running AUTOSOL. But the program stopped >> with the following error message pasted below mentioning some missing of >> symfile. We were not able to locate any parameters file on the >> installation >> directory. It would be helpful if we get some useful suggestions on this. >> >> Thanks in advance, >> Mohan >> *********************************************************** >> >> PHENIX AutoSol Tue Feb 2 12:37:41 2010 >> >> ************************************************************ >> >> Working directory: /home/sar06mbr/30JanDiamondI02/107/107_php22121 >> >> PHENIX VERSION: 1.6 of 29-01-2010 PHENIX RELEASE_TAG : 289 PHENIX MTYPE : >> intel-linux-2.6 PHENIX MVERSION : suse AutoSol_start AutoSol Run 2 Tue Feb >> 2 12:37:41 2010 INPUT FILE LIST: >> ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz', >> '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz', >> '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_4_P22121_scala2.mtz'] >> >> Copied /home/sar06mbr/30JanDiamondI02/107/107_php22121/result.seq to >> /home/sar06mbr/30JanDiamondI02/107/107_php22121/AutoSol_run_2_/sequence_autosol.dat >> >> Setting chain_type to PROTEIN Setting defaults for data_quality moderate >> Setting thorough_denmod to Yes Settin fix_xyz_after_denmod to False >> Setting >> max_ha_iterations to 2 Setting fixscattfactors to No Settin defaults for >> thoroughness quick Setting best_of_n_hyss_always to 1 Setting >> max_extra_unique_solutions to 0 Settin ha_iteration to No Setting >> max_choices to 1 Setting number_of_models to 1 Setting number_of_builds to >> 1 Setting test_mask_type to No Setting n_cycle_build to 0 Setting >> thorough_loop_fit to Setting create_scoring_table to No Not truncating ha >> sites at start of resolve as this is not PHASER SAD phasing >> >> Trying to guess refinement file for later use from >> ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz', >> '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz', >> '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_4_P22121_scala2.mtz'] >> >> Choosing guess of refinement file for later use from all files: >> ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz', >> '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz', >> '/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_4_P22121_scala2.mtz'] >> >> FILE TYPE ccp4_mtz >> >> COLUMN LABELS: ['H', 'K', 'L', 'FreeR_flag', 'F_107_2re', 'SIGF_107_2re', >> 'F_107_2re(+)', 'SIGF_107_2re(+)', 'F_107_2re(-)', 'SIGF_107_2re(-)', >> 'DANO_107_2re', 'SIGDANO_107_2re', 'IMEAN_107_2re', 'SIGIMEAN_107_2re', >> 'I_107_2re(+)', 'SIGI_107_2re(+)', 'I_107_2re(-)', 'SIGI_107_2re(-)'] >> >> GUESS FILE TYPE MERGE TYPE mtz premerged TARGET LABELS ['F1', 'SIGF1', >> 'DANO1', 'SIGDANO1'] Unit cell: (34.79, 108.92, 134.88, 90, 90, 90) Space >> group: P 2 21 21 (No. 18) CONTENTS: >> ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz', >> 'mtz', 'premerged', 'P 2 21 21', [34.790000915527344, 108.92009735107422, >> 134.8800048828125, 90.0, 90.0, 90.0], 2.4890566908055836, ['F1', 'SIGF1', >> 'DANO1', 'SIGDANO1']] >> >> File >> /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz >> RES: 2.5 >> >> FILE TYPE ccp4_mtz COLUMN LABELS: ['H', 'K', 'L', 'FreeR_flag', >> 'F_107_3re', 'SIGF_107_3re', 'F_107_3re(+)', 'SIGF_107_3re(+)', >> 'F_107_3re(-)', 'SIGF_107_3re(-)', 'DANO_107_3re', 'SIGDANO_107_3re', >> 'IMEAN_107_3re', 'SIGIMEAN_107_3re', 'I_107_3re(+)', 'SIGI_107_3re(+)', >> 'I_107_3re(-)', 'SIGI_107_3re(-)'] >> >> GUESS FILE TYPE MERGE TYPE mtz premerged TARGET LABELS ['F1', 'SIGF1', >> 'DANO1', 'SIGDANO1'] Unit cell: (34.85, 109.18, 135.27, 90, 90, 90) Space >> group: P 2 21 21 (No. 18) CONTENTS: >> ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz', >> 'mtz', 'premerged', 'P 2 21 21', [34.849998474121094, 109.18000030517578, >> 135.26980590820312, 90.0, 90.0, 90.0], 2.4889952912293629, ['F1', 'SIGF1', >> 'DANO1', 'SIGDANO1']] >> >> File >> /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz >> RES: 2.5 >> >> FILE TYPE ccp4_mtz COLUMN LABELS: ['H', 'K', 'L', 'FreeR_flag', >> 'F_107_4re', 'SIGF_107_4re', 'F_107_4re(+)', 'SIGF_107_4re(+)', >> 'F_107_4re(-)', 'SIGF_107_4re(-)', 'DANO_107_4re', 'SIGDANO_107_4re', >> 'IMEAN_107_4re', 'SIGIMEAN_107_4re', 'I_107_4re(+)', 'SIGI_107_4re(+)', >> 'I_107_4re(-)', 'SIGI_107_4re(-)'] >> >> GUESS FIL TARGET LABELS ['F1', 'SIGF1', 'DANO1', 'SIGDANO1'] Unit cell: >> (34.87, 109.2, 135.33, 90, 90, 90) Space group: P 2 21 21 (No. 18) >> CONTENTS: >> ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_4_P22121_scala2.mtz', >> 'mtz', 'premerged', 'P 2 21 21', [34.869998931884766, 109.19999694824219, >> 135.32989501953125, 90.0, 90.0, 90.0], 2.4890134311310943, ['F1', 'SIGF1', >> 'DANO1', 'SIGDANO1']] >> >> File >> /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_4_P22121_scala2.mtz >> RES: 2.5 >> >> Guess of datafile for refinement: >> /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz >> >> Using >> /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz >> for refinement >> >> Specify >> input_refinement_file=/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_3_P22121_scala2.mtz >> to change this >> >> HKLIN ENTRY: >> /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz >> >> FILE TYPE ccp4_mtz >> >> COLUMN LABELS: ['H', 'K', 'L', 'FreeR_flag', 'F_107_2re', 'SIGF_107_2re', >> 'F_107_2re(+)', 'SIGF_107_2re(+)', 'F_107_2re(-)', 'SIGF_107_2re(-)', >> 'DANO_107_2re', 'SIGDANO_107_2re', 'IMEAN_107_2re', 'SIGIMEAN_107_2re', >> 'I_107_2re(+)', 'SIGI_107_2re(+)', 'I_107_2re(-)', 'SIGI_107_2re(-)'] >> >> GUESS FILE TYPE MERGE TYPE mtz premerged TARGET LABELS ['F1', 'SIGF1', >> 'DANO1', 'SIGDANO1'] Unit cell: (34.79, 108.92, 134.88, 90, 90, 90) Space >> group: P 2 21 21 (No. 18) CONTENTS: >> ['/home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz', >> 'mtz', 'premerged', 'P 2 21 21', [34.790000915527344, 108.92009735107422, >> 134.8800048828125, 90.0, 90.0, 90.0], 2.4890566908055836, ['F1', 'SIGF1', >> 'DANO1', 'SIGDANO1']] >> >> Inverse hand of space group: P 2 21 21 Creating sg entry from >> /home/sar06mbr/30JanDiamondI02/107/107_php22121/M75_Zn_107_2_P22121_scala2.mtz >> Unit cell: (34.79, 108.92, 134.88, 90, 90, 90) Space group: P 2 21 21 (No. >> 18) Space group name is: P 2 21 21 symbol is: p22121 >> >> **************************************** >> >> AutoSol Input failed >> >> Need a symfile for solve >> >> **************************************** >> >> _______________________________________________ >> phenixbb mailing list >> phenixbb(a)phenix-online.org >> http://phenix-online.org/mailman/listinfo/phenixbb >>

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Phenix version 1.6 released
by Paul Adams 01 Feb '10

01 Feb '10

The Phenix developers are pleased to announce that version 1.6 of Phenix is now available. Binary installers for Linux, and Mac OSX platforms are available at the download site: http://phenix-online.org/download/ Just some of the new features in this version (1.6) are: - New Graphical User Interfaces for AutoMR, and Phaser (in MR and SAD modes) - Improved reflection file editor GUI and command line tool - Updated map calculation GUI - C++ version of Resolve - Refinement of residues spanning symmetry axes in phenix.refine - New RNA sugar pucker geometry restraints in phenix.refine - Torsion angle dynamics refinement updates - Optional real space refinement of ligands in LigandFit wizard For a full list of changes see: http://www.phenix-online.org/documentation/CHANGES Please note that there is a new publication that should be used to cite use of Phenix: PHENIX: a comprehensive Python-based system for macromolecular structure solution. P. D. Adams, P. V. Afonine, G. Bunkóczi, V. B. Chen, I. W. Davis, N. Echols, J. J. Headd, L.-W. Hung, G. J. Kapral, R. W. Grosse-Kunstleve, A. J. McCoy, N. W. Moriarty, R. Oeffner, R. J. Read, D. C. Richardson, J. S. Richardson, T. C. Terwilliger and P. H. Zwart. Acta Cryst. D66, 213-221 (2010). Full documentation is available here: http://www.phenix-online.org/documentation/ There is a Phenix bulletin board: http://www.phenix-online.org/mailman/listinfo/phenixbb/ Please consult the installer README file or online documentation for installation instructions. Direct questions and problem reports to the bulletin board or: help(a)phenix-online.org and bugs(a)phenix-online.org Commercial users interested in obtaining access to Phenix should visit the Phenix website for information about the Phenix Industrial Consortium. The development of Phenix is principally funded by the National Institute of General Medical Sciences (NIH) under grant P01-GM063210. We also acknowledge the generous support of the members of the Phenix Industrial Consortium. -- Paul Adams Acting Division Director, Physical Biosciences Division, Lawrence Berkeley Lab Adjunct Professor, Department of Bioengineering, U.C. Berkeley Vice President for Technology, the Joint BioEnergy Institute Head, Berkeley Center for Structural Biology Building 64, Room 248 Tel: 1-510-486-4225, Fax: 1-510-486-5909 http://cci.lbl.gov/paul Lawrence Berkeley Laboratory 1 Cyclotron Road BLDG 64R0121 Berkeley, CA 94720, USA. Executive Assistant: Patty Jimenez [ PAJimenez(a)lbl.gov ] [ 1-510-486-7963 ] --

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data used in refinement
by Karolina Michalska 01 Feb '10

01 Feb '10

Hi all, I have a question concerning number of reflections used in refinement. In the phenix.refine log I can find a table saying that there are 34314 reflections in a work set and 1104 in a free set. This is in agreement with what Refmac prints out to pdb file under REMARK 3 (DATA USED IN REFINEMENT). However, the same remark in the pdb file produced by phenix.refine says there are 35404, which is neither a work set nor a sum of work and test sets. It is almost the latter option but still 14 reflections are missing and I cannot find in the log file what happened with them. Can anyone help me here? Karolina

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auto-open MTZ scheme
by Paul Emsley 29 Jan '10

29 Jan '10

Dear Phenixers, Prompted by Randy Read, Kevin and I have agreed that Coot should be able to auto-open MTZ files with columns labelled groupname.F_phi.F and groupname.F_phi.phi and groupname.DF_phi.DF, groupname.DF_phi.phi for difference maps for any value of groupname, of course. (Any weights should be applied to Fs before writing the file). We were wondering what the Phenix community/developers thought about that idea (there's not much point in adding this feature if you don't agree). Thanks, Paul.

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For your consideration: Table 1
by SIPPEL,KATHERINE H 29 Jan '10

29 Jan '10

Dear PHENIX programmers, I would like to preface this comment by saying that I love your suite of programs. I have converted to a 100% PHENIX fan girl and am dragging the rest of my lab down with me. I realize that you have a lot on your plates right now, what with all the bug fixes, updates, and bulletin board troubleshooting that you do. I am also primarily a biologist and have no comprehension of the effort required to keep everything running, but I do have a suggestion/request. I was putting the finishing touched on the first draft of a manuscript today and thought to myself, wouldn't it me wonderful if PHENIX could generate that all important crystallographic Table 1. You know the one that I am talking about with the data and refinement statistics. I am thinking a combination of PDB_EXTRACT and MOLEMAN where you input the log files from scaling and refinement and it outputs a handy-dandy test file with "parameter<tab>number that could easily be imported into your favorite spreadsheet (Open Office or Excel). I envision an interface with check boxes for the parameters you want to include and a place were you could input the resid of ligands for atom and b-factor counts. Like I said it is just a suggestion, in case you find yourselves bored and with time on your hands. Thanks for your time, Katherine -- SIPPEL,KATHERINE H Ph. D. candidate McKenna Lab Department of Biochemistry and Molecular Biology College of Medicine University of Florida

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phenix.pdbtools and anomalous?
by Kay Diederichs 28 Jan '10

28 Jan '10

Hi, I like the way I can obtain Fcalc with phenix.pdbtools --f-model. However I need to have the anomalous signal as well, for certain atoms, and a given wavelength. This does not seem to be possible with phenix.pdbtools. Is there a way to do this with phenix.refine ? thanks, Kay -- Kay Diederichs http://strucbio.biologie.uni-konstanz.de email: Kay.Diederichs(a)uni-konstanz.de Tel +49 7531 88 4049 Fax 3183 Fachbereich Biologie, Universität Konstanz, Box M647, D-78457 Konstanz This e-mail is digitally signed. If your e-mail client does not have the necessary capabilities, just ignore the attached signature "smime.p7s".

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Re: [phenixbb] refinement with alternative molecules?
by Su-Chang Lin 28 Jan '10

28 Jan '10

Hi Ralf, I've done the refinement with alt. conf.. The occupancy is 0.58 for Mol A, 0.42 for Mol B. The maps look OK. R-factors drops a little bit. Before when I put Mol A in that region for refinement, I saw additional densities (a helix) for Mol B. When I put Mol B in the region for refinement, I saw additional densities (loops) for Mol A. Now with alt. conf. there are no additional densities. Can I use the occupancies for publication? Or do I need to do/check something else? Thanks! Su-Chang > Hi Su-Chang, > > I will try to refine the structure without NCS restraints. > I'd be interested to know how it goes, although I'm too busy to get > into the NCS code right now. > If the resolution is low I'd think it is better to use NCS, without > alt. conf. The mismatches you saw between related molcules may > be pure artifacts. But trying is better than guessing! > Ralf > _______________________________________________ > phenixbb mailing list > phenixbb(a)phenix-online.org > http://phenix-online.org/mailman/listinfo/phenixbb

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new release of IL MILIONE
by Dritan Siliqi 28 Jan '10

28 Jan '10

1 0

Using LigandFit to identify unknown density
by Katya Heldwein 28 Jan '10

28 Jan '10

Hi, I'd like to run LigandFit to identify a small molecule accounting for an unknown density. How do I do that, preferably, in a command-line mode? Katya -- Ekaterina Heldwein, Ph.D. Assistant Professor Department of Molecular Biology and Microbiology Tufts University School of Medicine 136 Harrison Ave Boston, MA 02111 phone: 617-636-0858 fax: 617-636-0337 e-mail: katya.heldwein(a)tufts.edu

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refinement with alternative molecules?
by Su-Chang Lin 27 Jan '10

27 Jan '10

Hi, Recently I got a crystal structure of a multiple-molecules protein complex. There are many protein subunits with the same fold. From the likelihood-weighted maps by Phenix, I can see two different subunits occupy the same position. (So I can put the model of either subunit in the same densities, but some loop regions and the C-terminal tail look different. ). I know Phenix can do occupancy refinement with a residue that has N alternative conformations. My question is can Phenix do occupancy refinement with alternative molecules? The RMSD for two subunits is about 1.3 angstrom. The sequence identity is about 30%. Thank you very much! Su-Chang Lin, Ph.D., Postdoc Associate Department of Biochemistry Weill Medical College, Cornell University Whitney Building, room W-212 1300 York Avenue, New York, NY 10021 212-746-6458

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