Cu(II) Binding to the Peptide Ala His His, a Chimera of the Canonical Cu(II) Binding Motifs Xxx His and Xxx Zzz His Inorganic Chemistry Intermediate Cu(II) Thiolate Species in the Reduction of Cu(II)GHK by Glutathione: A Handy Chelate for Biological Cu(II) Reduction Inorganic Chemistry The copper(II) binding tripeptide GHK, a valuable crystallization and phasing tag for macromolecular crystallography 4.5: Coordination Numbers and Structures Chemistry LibreTexts