Chain reversals in model peptides: Studies of cystine-containing cyclic peptides. 3. Conformational free energies of cyclization of tetrapeptides of sequence Ac-Cys-Pro-X-Cys-NHMe

Article abstract of DOI:10.1021/ja00037a003

Six tetrapeptides of amino acid sequence Ac-Cys-Pro-X-Cys-NHMe, where X = Asn, Gly, Ser, Phe, Val, and Aib, respectively, were synthesized, and the molecular structures of the cyclic forms of two of them (with X = Ser and Val, respectively) were determine