A peptide substrate for Histone 4 (R3) methyltransferases. The peptide corresponds to aa1-21 of histone H4.Application:Study enzyme kinetics, and screen small molecular inhibitors of Histone 3 (R3) methyltransferases for drug discovery and HTS applications. Other applications not tested.Concentration: 200ul @ 800uMStorage and Stability:Aliquot to avoid repeated freezing and thawing and store at -70°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Aliquots are stable for at least 6 months.