Intermediate Cu(II) Thiolate Species in the Reduction of Cu(II)GHK by Glutathione: A Handy Chelate for Biological Cu(II) Reduction Inorganic Chemistry Geometry of the (a) four , (b) five , (c) five and (d) six Download Scientific Diagram 2.4: Geometries of Coordination Complexes Chemistry LibreTexts Theoretical study of copper binding to GHK peptide ScienceDirect The copper(II) binding tripeptide GHK, a valuable crystallization and phasing tag for macromolecular crystallography For the complexes showing the square pyramidal structure, the d orbital involved in the hybridis