This peptide, KKKSPGEYVNIEFG, is derived from human IRS-1 and is a substrate for TRK1, JAK2, and RET kinases. Product Specification Sequence:Lys-Lys-Lys-Ser-Pro-Gly-Glu-Tyr-Val-Asn-Ile-Glu-Phe-Gly MW:1596.5 Purity:95% Long Term Storage:-20°C