1HH7:
reference: Crystallization and preliminary X-ray analysis of two pH-dependent forms of cytochrome c2 from Rhodopseudomonas palustris., Garau G, Geremia S, Randaccio L, Vaccari L, Viezzoli MS, Acta Crystallogr D Biol Crystallogr 2000 Dec;56 Pt 12:1699-701. PMID: 11092951

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