ABF calculations - reaction coordinate

From: Mohan maruthi sena (maruthi.sena_at_gmail.com)
Date: Mon Nov 16 2015 - 19:15:15 CST

Hi all,
             I am trying to perform ABF calculations using NAMD. I want
choose NH bond vector and surface normal vector [have plane surface] as
reaction coordinates and want to find out angle between them. Could
someone suggest me the relevant collective variable in ABF for this type
of calculation?

Thanks & Regards,

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