Prostamax is a synthetic tetrapeptide (Lys-Glu-Asp-Pro, KEDP) from the Khavinson short-peptide series, associated with prostate tissue in the source literature. It is a defined synthetic peptide, distinct from the prostate-derived polypeptide complexes that share its research lineage. It has the molecular formula C₂₀H₃₃N₅O₉, a molecular weight of approximately 487.51 g/mol, CAS number 473578-47-1. Its sequence is Lys-Glu-Asp-Pro (KEDP). In organotypic explant culture KEDP has been reported to act tissue-specifically on prostate explants. Its described DNA-binding and chromatin effects derive from in-vitro work and docking models rather than solved structures. Supplied as a white to off-white lyophilized powder, stored refrigerated at 2–8 °C. This product is strictly for research purposes only.