Hi Rahul,<br><br>It depends how fixed you want. You could make it a freeze group and it will stay exactly where and the way it is. However, a better idea is to use position restraints, which will attach each atom to a reference with a spring constant. For this you have to add a [ position_restraints ] section in the topology file. I think it's chapter 5 of the manual.
<br><br>Cheers,<br><br>Tsjerk<br><br><div><span class="gmail_quote">On 11/26/05, <b class="gmail_sendername">Rahul Karyappa</b> <<a href="mailto:r.karyappa@ncl.res.in">r.karyappa@ncl.res.in</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Dear all,<br>
I want to fix the atom positions of one of my chain
structure. How can I do that? Do I need to make any changes in the
topology file or any other file? Please suggest me the way to do this.<br>
Thanking you in advance.<br>
<br>
Rahul Karyappa<br>
NCL, Pune<br>
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