Amazon.com: QUBIT GHK Cu Copper Peptide Supplement for Skin & Hair, Easy to Absorb, Precisely Dosed 90 Vegan Capsules : Health & Household The FOXO4 peptide in a DRI conformation (D amino acids in a retro reversed sequence), henceforth named FOXO4 DRI, competes with FOXO4 for p53 binding in a dose dependent manner and doing so with higher affinity. Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Lysine Rich Polypeptide Modulates Forkhead Box O3 and Phosphoinositide 3 Kinase Protein Kinase B Pathway To Induce Apoptosis in Breast Cancer ACS Pharmacology & Translational Science Peptide inhibitors targeting FOXO4 p53 interactions and inducing senescent cancer cell specific apoptosis bioRxiv