4CWX:
reference: The Mobility of a Conserved Tyrosine Residue Controls Isoform-Dependent Enzyme-Inhibitor Interactions in Nitric Oxide Synthases., Li H, Jamal J, Delker S, Plaza C, Ji H, Jing Q, Huang H, Kang S, Silverman RB, Poulos TL, Biochemistry. 2014 Aug 11. PMID: 25089924

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