2Z1E:
reference: Crystal structures of [NiFe] hydrogenase maturation proteins HypC, HypD, and HypE: insights into cyanation reaction by thiol redox signaling., Watanabe S, Matsumi R, Arai T, Atomi H, Imanaka T, Miki K, Mol Cell. 2007 Jul 6;27(1):29-40. PMID: 17612488

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