Hydrogen bonding constraint

GROMACS version:
GROMACS modification: Yes/No
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I want to constrain hydrogen bonding pattern of a peptide ,can anyone enunciate how to accomplished that in gromacs ?

Also I want to assign a specific dihedral angle for amino acid residue in that peptide, I am not aware of how to do this too?

Thanks in advance

Here you find how to set distance but also dihedral restraints


Best regards