Dear Xavier,<br>thanks for your response. Yes, indeed I have tried to contact the authors, but perhaps they can't receive my mails. I have tried scaling sigma alone to 0.9 or 0.965 (which would correspond to a 10% reduction of radius or volume respectively). Since some special particles scale epsilon along with sigma, I also tried this, but with no success. <br>
Cheers, <br>Cesar<br><br><br><div class="gmail_quote">2009/12/10 XAvier Periole <span dir="ltr"><<a href="mailto:x.periole@rug.nl">x.periole@rug.nl</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div></div><div class="h5"><br>
On Dec 9, 2009, at 11:21 PM, César Ávila wrote:<br>
<br>
<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 would like to simulate a DPPC membrane in gel phase using Martini Force Field. As stated on<br>
<br>
"Simulation of gel phase formation and melting in lipid bilayers using a coarse grained model", CPL 135 (2005) 223-244<br>
<br>
the correct 30º angle chain tilt for DPPC might be reproduced by reducing the acyl chain spheres volume by 10%.<br>
So far, I have tried changing sigma and epsilon for C1-C1 pair interaction without success.<br>
</blockquote></div></div>
The sphere volume or radius is defined by sigma. Epsilon deals with the<br>
strength of the interactions; you do not want to modify it.<br>
Did you try to contact the authors? They might be of better<br>
help!<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
Best regards<br>
Cesar Avila<div class="im"><br>
<br>
<br>
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