none at uiuc.edu
Thu Jun 3 13:07:44 EST 1999
> I looked in my Cell book to see what you were talking about. Both of these
> structures are very stable structures. Tryptphan is stabilized by the ring
> structures and Arginine is stabilized by its resonance ability. I would say
> that these two amino acids are able to H-bond, but it is very unlikely due to
> resonance. That would be my guess.
Thanks for your reply. It prompts me to ask why histidine is able to
accept a H-bond - in fact both N-atoms in the His sidechain can be
H-bond acceptors. Does histidine not have resonance stabilization too?
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