3WJR:
reference: Crystal structures of the carbamoylated and cyanated forms of HypE for [NiFe] hydrogenase maturation., Tominaga T, Watanabe S, Matsumi R, Atomi H, Imanaka T, Miki K, Proc Natl Acad Sci U S A. 2013 Dec 2. PMID: 24297906

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