1CXA:
reference: Crystallization and X-ray structure determination of cytochrome c2 from Rhodobacter sphaeroides in three crystal forms., Axelrod HL, Feher G, Allen JP, Chirino AJ, Day MW, Hsu BT, Rees DC, Acta Crystallogr D Biol Crystallogr. 1994 Jul 1;50(Pt 4):596-602. PMID: 15299423

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