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Hi Dialing,<br>
<br>
for example, it may mean the following: <br>
we typically refine macromolecular structures using
maximum-likelihood (ML) target function and not the R-factor.
Maximizing the ML target does not necessarily mean minimizing the
R-factor (although free R is correlated with the phase error and the
latter should improve with the optimization of ML). So what you
observe is slightly odd but not too unexpected. <br>
<br>
This is discussed to some extent here (for example):<br>
<a class="moz-txt-link-freetext" href="http://www.ccp4.ac.uk/newsletters/newsletter37/08_ml.html">http://www.ccp4.ac.uk/newsletters/newsletter37/08_ml.html</a><br>
<br>
The other 10+ potential reasons include:<br>
- suboptimal refinement strategy;<br>
- target weights may need adjustment;<br>
- ...<br>
<br>
Pavel<br>
<br>
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<div><span>Dear All,</span></div>
<div><br>
<span></span></div>
<div><span>What it means if the Rwork or Rfree increase slightly
during refinement?</span></div>
<div><br>
<span></span></div>
<div><span>Best regards.</span></div>
<div><br>
<span></span></div>
<div><span>Dialing</span></div>
</div>
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