Dear Mr Mark,<br> Thanks very much for your reply, but I think I did not describe my question clearly in my last letter. <br> I know the value will move around the minimum defined at 120 degrees when using harmonic potential and the dihedral will deviate from 120 degrees during the simulation, but I don't know what magnitude of deviation is proper for the simulation. For example, in my simulation, the maximum deviation is 2 degree, is it too big or proper? Or should I <br>control the maximum deviation as small as possible? <br><br><br><br><br><br><br> Meng Li<br> 2007.7.4<br> <br><!-- urlfiles --><br><br><!-- footer --><br><br>
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