Regenerative and Protective Actions of the GHK Cu Peptide in the Light of the New Gene Data PMC Frontiers The Ubiquitin Proteasome System and Nutrient Stress Response The Ubiquitin Proteasome System. Initially through C terminal glycine, Download Scientific Diagram Viral claim says GHK Cu reset nearly 4,000 genes to a younger state and increased collagen production in a preclinical study. This refers to research on GHK Cu, a naturally occurring copper binding peptide that