Torsion Angles in the Cystine Bridge of Oxytocin in Aqueous Solution. Measurements of Circumjacent Vicinal Coupling between 1H, 13C, and 15N

Article abstract of DOI:10.1021/ja00528a004

The six couplings from 1H^α, 13C', and 15N' to the two β protons have been measured for the two half-cystyl residues in oxytocin, using a series of specially designed and synthesized isotopic isomers.In the case of half-cystyl 1, the observed co