3NLE:
reference: Exploration of the Active Site of Neuronal Nitric Oxide Synthase by the Design and Synthesis of Pyrrolidinomethyl 2-Aminopyridine Derivatives., Ji H, Delker SL, Li H, Martasek P, Roman LJ, Poulos TL, Silverman RB, J Med Chem. 2010 Oct 19. PMID: 20958055

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