Grade I, buffered aqueous glycerol solution, 0.8-2.0 units/mg protein
Grade IV, buffered aqueous glycerol solution, ≥400 units/mg protein
lyophilized powder, ≥1,000 units/mg protein (Lowry)
buffered aqueous glycerol solution, ≥1,000 units/mg protein (Lowry)
lyophilized powder, 50-100 units/mg protein (modified Warburg-Christian)
lyophilized powder, 10-20 units/mg protein (modified Warburg-Christian)
≥95% (SDS-PAGE), recombinant, expressed in E. coli, buffered aqueous solution