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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If I were you, I would proceed to whatever refinement you can do, then re-evaluate twinning. At such low resolution, however, things might be hard! Is the MR
solution in the PG 3 or 32? Are the PG 32 spacegroups large enough to accommodate your molecule(s)?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Jacob<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> phenixbb-bounces@phenix-online.org [mailto:phenixbb-bounces@phenix-online.org]
<b>On Behalf Of </b>Ursula Schulze-Gahmen<br>
<b>Sent:</b> Monday, June 06, 2016 4:47 PM<br>
<b>To:</b> PHENIX user mailing list<br>
<b>Subject:</b> [phenixbb] twinning detection<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I have an extremely low resolution data set to 6.5 A. The data were collected on a Pilatus detector, indexed and further processed in XDS, space group P321. Pointless determines spacegroup to P3221 or P3121
and L-test shows no twinning. Phenix X-triage indicates twinning, but the twin fraction varies enormously depending on the method used: Britton analysis 0.337, H-test 0.260, ML 0.022. The UCLA twin server also thinks that data are twinned. How do I evaluate
which information is right?<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Also, I think I found a molecular replacement solution that is correct using these twinned data.<o:p></o:p></p>
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<p class="MsoNormal">Ursula<br clear="all">
<o:p></o:p></p>
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<p class="MsoNormal">Ursula Schulze-Gahmen, Ph.D.<br>
Project Scientist<br>
UC Berkeley, QB3<br>
360 Stanley Hall #3220<br>
Berkeley, CA 94720-3220<br>
(510) 643 9491<o:p></o:p></p>
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