Purity: > 90% by SDS - PAGE Format: Liquid. In. 20mM Tris-HCl buffer (pH7.5) containing 10% glycerol, 1mM DTT. PPBP, also known as chemokine (C-X-C motif) ligand 7 (CXCL7), is a platelet-derived growth factor that belongs to the alpha-chemokine family, It is a protein that is released in large amounts from platelets following their activation. It stimulates various processes including mitogenesis, synthesis of extracellular matrix, glucose metabolism and synthesis of plasminogen activator. Recombinant human PPBP protein was expressed in E.coli and purified by using conventional chromatograph.