The stability and stoichiometry of β(3)-peptide bundles is influenced by side-chain identity. β(3)-peptides containing β(3)-homoleucine on one helical face assemble into octamers, whereas those containing β(3)-homovaline form tetramers. From a structural perspective, the side chains of β(3)-homoleucine and β(3)-homovaline differ in terms of both side-chain length and γ-carbon branching. To eval...

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