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291 bytes added ,  6 April 2017
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REIDX=0 1 0 0  0 0 1 0  1 0 0 0
REIDX=0 1 0 0  0 0 1 0  1 0 0 0
</pre>
</pre>
where the last line takes care of the shuffling of axes into the order k,l,h, , and obtain
where the last line takes care of the shuffling of axes into the order k,l,h, (after all, the XDS_ASCII.HKL are in P1 with  a,b,c of 38.3,79.1,79.1) , and obtain
<pre>
<pre>
  SUBSET OF INTENSITY DATA WITH SIGNAL/NOISE >= -3.0 AS FUNCTION OF RESOLUTION
  SUBSET OF INTENSITY DATA WITH SIGNAL/NOISE >= -3.0 AS FUNCTION OF RESOLUTION
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[[File:1g1c-94.png]]
[[File:1g1c-94.png]]


(If the space group were correct, the result of xscale_isocluster should look similar to this:
(If the space group were correct, the result of [[xscale_isocluster]] should look similar to this:


[[File:Lyso-xscale-isocluster.png]]
[[File:Lyso-xscale-isocluster.png]]
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and find that data sets 1 and 17 are wrongly included in the cloud of 51 data sets. Thus they are removed manually from XSCALE.INP.  
and find that data sets 1 and 17 are wrongly included in the cloud of 51 data sets. Thus they are removed manually from XSCALE.INP.  


After xscale_isocluster -dim 2 -clu 1 ,
After <code>xscale_isocluster -dim 2 -clu 1</code> ,
  coot iso.pdb
  coot iso.pdb
now reveals a single cloud:
now reveals a single cloud:
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thus we now know the spacegroup.
thus we now know the spacegroup.


== Round 2: using the REFERENCE_DATA_SET ==
== Round 2: using the REFERENCE_DATA_SET obtained from one cluster==


The processing script integrate.rc is changed a bit, to a) use the REFERENCE_DATA_SET, b) prevent adjustment of variances by CORRECT (this should be done by XSCALE) , c) allow some radiation damage correction in XSCALE:
The processing script integrate.rc is changed a bit, to a) use the REFERENCE_DATA_SET, b) prevent adjustment of variances by CORRECT (this should rather be done by XSCALE) , c) allow some radiation damage correction in XSCALE:
<pre>
<pre>
#!/bin/bash -f
#!/bin/bash -f
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The substructure (locating 4 Se with anom data to 3Å) and structure (198 residues) can now easily be solved with [[ccp4com:SHELX C/D/E|hkl2map]]:
The substructure (locating 4 Se with anom data to 3Å) and structure (198 residues) can now easily be solved with [[ccp4com:SHELX C/D/E|hkl2map]]:


== Result ==
=== SHELXC: anomalous CC<sub>1/2</sub> ===
[[File:Cc12ano.png]]
[[File:Cc12ano.png]]
 
=== SHELXD: CCall ''versus'' CCweak, and histogram ===
[[File:Ccallcsccweak.png]]  
[[File:Ccallcsccweak.png]]  


[[File:Histcfom.png]]  
[[File:Histcfom.png]]  
 
=== SHELXE: contrast versus cycle, and PDB with structure ===
[[File:Contrastvscycle.png]]  
[[File:Contrastvscycle.png]]  


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