50 amino acid protein representing full length mature TGFα of human origin, 100 µg
33 kDa, biologically active protein purified from bacterial lysates
ED50 as determined by the dose-dependent stimulation of thymidine uptake by BALB/c 3T3 cells is < 0.7 ng/ml, corresponding to a specific activity of > 1.4 x 106 units/mg
