GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link GHK Cu Peptide Copper Peptide Research Beyond Peptides Food Derived TripeptideCopper Self Healing Hydrogel for Infected Wound Healing Biomaterials Research In Vitro and in Vivo Studies of pH Sensitive GHK Cu Incorporated Polyaspartic and Polyacrylic Acid Superabsorbent Polymer ACS Omega