Characterization of Copper(III)-Tetrapeptide Complexes with Histidine as the Third Residue.

Copper(III) complexes of Gly(2)HisGly and Aib(2)HisGly are characterized, where Gly is glycine, His is L-histidine, and Aib is alpha-aminoisobutyric acid. Their respective reduction potentials (V vs NHE) are 0.978 and 0.