Composition of the SoxABCD terminal oxidase of S. acidocaldarius.

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Composition of the SoxABCD terminal oxidase of S. acidocaldarius. Composition of the SoxABCD terminal oxidase of S. acidocaldarius. The shaded areas represent the membrane. Each box represents a single constituent polypeptide with its type of redox center and the redox potential measured at pH 6.5. The dashed oval insert illustrates the proposed location of the binding site for caldariella quinone at an interface between subunit II (SoxA) and the cyt b analog SoxC. Further details are given in the text. Günter Schäfer et al. Microbiol. Mol. Biol. Rev. 1999; doi: