1RYT:
reference: The structure of Desulfovibrio vulgaris rubrerythrin reveals a unique combination of rubredoxin-like FeS4 and ferritin-like diiron domains., deMare F, Kurtz DM Jr, Nordlund P, Nat Struct Biol 1996 Jun;3(6):539-46. PMID: 8646540

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