Nine is the number: Novel C9-hydrogen-bonded structures (in which the hydrogen bonds enclose a ring of nine atoms) are observed in protected di- and tetrapeptides formed by the γ-amino acid residue gabapentin. The structures reveal new families of C9 helices and ribbons (see structure) in γ-polypeptides.
No takes yet. Share an insight, caveat, or question.
Vasudev et al. (2005) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: