recombinant, expressed in E. coli, lyophilized powder, 10-15 units/mg protein

lyophilized powder, ≥25 units/mg protein

from calf intestine, pkg of 2 mL (10 mg); ~200 units/mg protein (At 25 °C with adenosine as the substrate.)

from calf intestine, pkg of 1 mL (10 mg); ~200 units/mg protein (At 25 °C with adenosine as the substrate.)

recombinant, expressed in E. coli, ≥0.5 U/mL

Type X, buffered aqueous glycerol solution, ≥130 units/mg protein

Type IX, ammonium sulfate suspension, 150-200 units/mg protein

recombinant, expressed in E. coli, ≥2.0 U/mg