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Formation of Engineered Intersubunit Disulfide Bond in Cytochrome bc1 Complex Disrupts Electron Transfer Activity in the Complex He-Wen Ma, Shaoqing Yang, Linda Yu, and Chang-An Yu Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK 74078 Protein domain movement of the Rieske iron-sulfur protein has been speculated to play an essential role in the bifurcated oxidation of ubiquinol catalyzed by the cytochrome bc1 complex.

The BAM complex subunit BamE (SmpA) is required for membrane integrity, stalk growth and normal levels of outer membrane β-barrel proteins in Caulobacter crescentus Kathleen R. Ryan, James A. Taylor,† and Lisa M. Bowers Department of Plant and Microbial Biology, 111 Koshland Hall, University of California, Berkeley, Berkeley, CA 94720, USA Received September 30, 2009; Revised November 20, 2009; Accepted November 27, 2009.