Re: [ccp4bb] Indexing question

2017-07-18 Thread Andrew Leslie
Dear Grace, There are two ways that you can do this. If you run POINTLESS/AIMLESS from iMosflm using the “Quickscale” option, you can tell POINTLESS to use the symmetry set at the indexing stage, using SETTINGS -> Processing options -> Sort Scale and Merge tab,, select the

[ccp4bb] indexing(?) question in P21

2012-04-19 Thread wtempel
Hello all, I am puzzled by this situation: I have two different crystal of the same protein, in the presence, one in the absence of a ligand. Both structures refine nicely in space group P21. Cell constants (a,b,c,beta) are (i) 61,124,61,119 (ac by a hair) and (ii) 59,125,61,118. There is a

Re: [ccp4bb] indexing(?) question in P21

2012-04-19 Thread Phil Jeffrey
Wolfram, Did you solve these structures independently by molecular replacement ? It sounds like your two solutions might be related by alternative origins (0,1/2 along a,c). If you translate the second example along the a axis by -a/2 does it refine with similar R-factors ? Phil Jeffrey

Re: [ccp4bb] indexing(?) question in P21 - solved

2012-04-19 Thread Bryan Lepore
On Thu, Apr 19, 2012 at 4:28 PM, wtempel wtem...@gmail.com wrote: I went ahead and explicitly applied that +0.5*a translation. [...] It turns out that after the origin shift, some distances between equivalent atoms of the two structures exceeded 3A I'd be interested to know if cphasematch