| Antigen | Bacterial GST protein (27 kda) was expressed as C-terminal His (x6) fusion protein in E. coli and purified (>95%). Purified GST-His protein (Cat # GST13-R) is supplied in 50 mM Tris, pH 8, 0.15M NaCl, and 20% glycerol (see lot sp conc on the vial). |