108 amino acid protein fragment of PDGF-B of human origin, 50 µg
39 kDa, biologically active, tagged fusion protein purified from bacterial lysates
ED50 as determined by the dose-dependent stimulation of thymidine uptake by BALB/c 3T3 cells is < 1ng/ml, corresponding to a specific activity of > 1 x 106 units/mg
