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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hello,<br>
<br>
how can i select two chains to be refined as one rigid body? I tried <br>
refinement.refine.sites {<br>
rigid_body = chain A and chain B<br>
}<br>
but it did not work.<br>
<br>
Irina<br>
<br>
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