lyophilized powder, ≥5,000 units/mg protein (Lowry)

recombinant, expressed in E. coli, buffered aqueous solution; ≥5 units/ml

recombinant, expressed in E. coli, 20 U/mg

recombinant, expressed in E. coli, 30 U/mg

recombinant, expressed in E. coli, ≥16 U/mg, buffered aqueous solution

recombinant, expressed in E. coli, buffered aqueous solution; ≥1.25 U/ml

≥90% (SDS-PAGE), recombinant, expressed in E. coli, buffered aqueous glycerol solution, >20,000 units/mg protein

≥0.007 unit/mg solid