lyophilized powder, ≥100 units/mg protein

recombinant, expressed in E. coli, buffered aqueous glycerol solution, hydroxamate transferase ≥200 units/mg protein (biuret)

powder, ~1 U/mg

powder, white, ~8 U/mg

Type C-3, powder, ≥600,000 units/g solid

Type III, powder, 15,000-50,000 units/g solid

Type III, glycerol solution, 500-800 units/mL

Type IX, powder, 50,000-100,000 units/g solid