Beta Barrel

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The beta-barrel is an intergral transmembrane protein which functions as a membrane channel for molecules. The beta-barrel consists of a varying number of beta strands, from as few as 8 to as many as 22. This form of transmembrane protein is abundant in the outer membrane of mitochondria, choroplasts, and many bacteria in contrast to alpha-helix cell membrane protein which is frequently found in eukaryotic cell membranes [1]


  1. Molecular Biology of the Cell, Alberts et al., 5th Edition (2007) Garland Science, New York.fckLRChapter 10 (pages 634-635).

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