2IBZ:
reference: A Comparison of Stigmatellin Conformations, Free and Bound to the Photosynthetic Reaction Center and the Cytochrome bc(1) Complex., Lancaster CR, Hunte C, Kelley J 3rd, Trumpower BL, Ditchfield R, J Mol Biol. 2007 Feb 11;. PMID: 17337272

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