lyophilized powder, 300-1,000 units/mg protein

Type XI, lyophilized powder, ≥200 units/mg protein

Grade I, aqueous solution, 1-4 units/mg protein (Lowry), ~10 units/mL

>95% (SDS-PAGE), ≥100 units/mg protein, lyophilized powder

ammonium sulfate suspension, ≥100 units/mg protein

recombinant, expressed in E. coli,  ≥10 unit/mg solid

buffered aqueous glycerol solution, ≥2 units/μL

aqueous glycerol solution, ≥95% by SDS Electrophoresis; ≥2 unit/μL