[gmx-users] dihedral PCA

[simula_460]

Hi,

I want to perform the dihedral PCA for two residues of a turn region in a
protein i.e 4 dihedral angles. I have created an index file for the atoms
constituting phi and psi angles for those two residues. But I don't
understand what has to be written in covar file .. According to manual it
says "covar.ndx, which necessarily contains one group of atom 1 to
integer(2*N/3), where N is the number of dihedral angles". I don't get the
meaning of this line ?? Can anybody guide me ...

Regards
----------------------
Bharat

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