This shows my ignorance about mtz files. I&#39;m having trouble with phenix.find_helices_strands. I got 3kat.mtz from Pavel&#39;s database. <div><br></div><div>I run:<div>$ phenix.find_helices_strands 3kat.mtz labin=&quot;LABIN FP=2FOFCWT PHIB=PH2FOFCWT&quot;</div>
<div><br></div><div>and get:</div><div><br><div><div>PHENIX find_helices_strands</div><div>Wed Apr 27 13:12:19 2011</div><div>Commands: phenix.find_helices_strands  3kat.mtz labin=LABIN FP=2FOFCWT PHIB=PH2FOFCWT</div><div>
<br></div><div><br></div><div>#                       find_helices_strands</div><div>#</div><div># Find secondary structure in a map defined by map coeffs in an input mtz file.</div><div># Type phenix.doc for help</div><div>
Input map resolution is 3.1  A</div><div>Labin line will be:  LABIN FP=2FOFCWT PHIB=PH2FOFCWT</div><div>To change it modify this by specifying FP= and PHIB= [and optionally FOM=]</div><div>like this:</div><div> labin=&quot;LABIN FP=2FOFCWT PHIB=PH2FOFCWT&quot;</div>
<div><br></div><div><br></div><div>Map from:  TEMP_3kat.mtz  using labin  LABIN FP=2FOFCWT PHIB=PH2FOFCWT</div><div>NOTE: ratio_trace_extra increased to    1.3 A as dmin &gt; 3.0</div><div>NOTE: rad_sep_trace increased to    0.6 A as dmin &gt; 3.0</div>
<div>Fixing sampling interval rad_sep_trace=   0.6 A</div><div>Optimizing CA-CA tolerance to obtain ratio of  4.0  for nonamers:atoms</div><div>Tracing chains at resolution of    3.1 A</div><div> CCP4:  Error in label assignments in LABIN</div>
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