Recombinant full-length human SRC with N-terminal GST tag (Gene accession number NM_005417), expressed in a Baculovirus infected Sf9 cell expression system. Specific Activity: ~55 pmol/min/ug. Assay condition: 50mM HEPES (pH7.5), 10mM MgCl2, 1 mM EGTA, 0