Atom type for protonated pyridine N

From: Branko (
Date: Fri Mar 26 2010 - 02:24:16 CDT

Please let me know which atom type should be assigned to protonated
pyridine nitrogen,

CHARMM definition for nitrogen in a 6-membered aromatic ring is N6R, and
N3 nitrogens in charged histidine ring,

Which of those two definitions better fit.

Thank you very much in advance.


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