5AUK:
reference: X-ray Structure and Nuclear Magnetic Resonance Analysis of the Interaction Sites of the Ga-Substituted Cyanobacterial Ferredoxin., Mutoh R, Muraki N, Shinmura K, Kubota-Kawai H, Lee YH, Nowaczyk MM, Rogner M, Hase T, Ikegami T, Kurisu G, Biochemistry. 2015 Oct 6;54(39):6052-61. doi: 10.1021/acs.biochem.5b00601. Epub, 2015 Sep 30. PMID: 26348494

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