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. Author manuscript; available in PMC: 2008 Mar 24.
Published in final edited form as: Curr Top Med Chem. 2007;7(11):1107–1119. doi: 10.2174/156802607780906645

Fig. (2).

Fig. (2)

Structure of the potent monocyclic peptide Ac-Nle-c[Asp-Pro-D-Nal(2′)-Arg-Trp-Lys]NH2, referred to as PG-901, and the conformationally constrained amino acids [61].