H-Ala-Pro-Arg-Thr-Pro-Gly-Gly-Arg-Arg-OHSubstrate for p44mpk and MAPK Substrate for myelin basic protein kinase (p44mpk) and for MAP kinase (MAPK/ERK).Product SpecificationFormula: C39H70N18O1 MW: 967.1 Purity: ≥98% Appearance: White powder. Long Term Storage: -20°C