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Learning your αβγ′s: The diversity of hydrogen‐bonding patterns in backbone‐expanded hybrid helices is shown by crystal‐structure determination of several oligomeric peptides (see scheme; C=gray; H=white; O=red; N=blue). C12 helices were observed in the αγ peptide series for n=2–8. In comparison, the αα peptide and αβ peptide sequences show C10 and mixed C14/C15 helices, respectively.
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