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Hi Murpholino,<br>
<br>
reasons are similar to why crystallographic R factor never goes to
zero.<br>
<br>
Model-map CC is calculated between the map (the data, in case of
cryo EM, or sort of data in case of Crystallography) and a model. As
you know data always has errors and model is just an approximation
to reality. So you have no chance to match them perfectly, unless
overfit. Something along these lines..<br>
<br>
Pavel<br>
<br>
<div class="moz-cite-prefix">On 6/14/19 12:42, Murpholino Peligro
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAMdBu0VRni4bhedwbQLSnV3eckR1K+1xevQv9aRTFyFfo_cwDA@mail.gmail.com">
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<div>The links below show a plot of the results of
phenix.real_space_correlation* for a nice lisozyme crystal and
also the coot view.</div>
<div><a
href="https://drive.google.com/open?id=0B9tqXyDsq9YIdkRhcVFXU2dEdnhINXR6Y3hza2Y5NGpNM1hV"
moz-do-not-send="true">https://drive.google.com/open?id=0B9tqXyDsq9YIdkRhcVFXU2dEdnhINXR6Y3hza2Y5NGpNM1hV</a></div>
<div><a
href="https://drive.google.com/open?id=0B9tqXyDsq9YIREd1OFZhNGZtRnN4aldtVU1mdk84NExVX2Vn"
moz-do-not-send="true">https://drive.google.com/open?id=0B9tqXyDsq9YIREd1OFZhNGZtRnN4aldtVU1mdk84NExVX2Vn</a></div>
<div><br>
</div>
<div>As you can see the electron density fits very well the
model. <br>
</div>
<div>Why not a single residue gets a perfect correlation
coefficient? (i.e. 1)</div>
<div><br>
</div>
<div><br>
</div>
<div>Just curious. <br>
</div>
<div><br>
</div>
<div>Thanks<br>
</div>
<div><br>
</div>
<div>
<div><br>
</div>
<div>* phenix.real_space_correlation pdbfile mtzfile
--detail="residue" > outpu</div>
</div>
</div>
<br>
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