1M1R:
reference: Crystal structures at atomic resolution reveal the novel concept of "electron-harvesting" as a role for the small tetraheme cytochrome c., Leys D, Meyer TE, Tsapin AS, Nealson KH, Cusanovich MA, Van Beeumen JJ, J Biol Chem 2002 Sep 20;277(38):35703-11. PMID: 12080059

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