Information transfer: Crystal structures of bicyclic dipeptide analogues within oligopeptides are described for the first time. The bicyclic dipeptides occupy the i to i+1 positions of either βI or βII turns. The rigidified dipeptides form hydrogen-bonding networks which transfer structural information along chains of ambident proton donors and acceptors over several Å (see structures; arrows: hydrogen bonds, red O, blue N, yellow S).
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Tremmel et al. (2004) studied this question.
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