noun, plural: beta barrels
Beta-strands in beta-barrels are typically arranged in an antiparallel fashion. These structures are commonly found in porins and other proteins that span cell membranes and in proteins that bind hydrophobic ligands in the barrel center, as in lipocalins.
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... of the channel. The protein has a mushroom-like shape, with a 50A beta-barrel stem protruding from the cap domain through the lipid bilayer into the cell's interior. ...
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