1YST:
reference: Structure of the photochemical reaction centre of a spheroidene-containing purple-bacterium, Rhodobacter sphaeroides Y, at 3 A resolution., Arnoux B, Gaucher JF, Ducruix A, Reiss-Husson F, Acta Crystallogr D Biol Crystallogr. 1995 May 1;51(Pt 3):368-79. PMID: 15299304

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