5D5P:
reference: Towards artificial methanogenesis: biosynthesis of the [Fe]-hydrogenase cofactor and characterization of the semi-synthetic hydrogenase., Bai L, Fujishiro T, Huang G, Koch J, Takabayashi A, Yokono M, Tanaka A, Xu T, Hu X, Ermler U, Shima S, Faraday Discuss. 2017 Mar 15. doi: 10.1039/c6fd00209a. PMID: 28294213

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