4HR4:
reference: Direct observation of structurally encoded metal discrimination and ether bond formation in a heterodinuclear metalloprotein., Griese JJ, Roos K, Cox N, Shafaat HS, Branca RM, Lehtio J, Graslund A, Lubitz W, Siegbahn PE, Hogbom M, Proc Natl Acad Sci U S A. 2013 Oct 22;110(43):17189-94. doi:, 10.1073/pnas.1304368110. Epub 2013 Oct 7. PMID: 24101498

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