Type II, buffered aqueous solution, 8-24 units/mg protein (Lowry, using NAN-lactose)

buffered aqueous solution; ≥5 Units/ml

Type III, buffered aqueous solution, 0.2 μm filtered, 1-5 units/mg protein (Lowry, using NAN-lactose)

recombinant, expressed in E. coli, buffered aqueous solution; ≥135 units/mg protein; ≥5 units/ml

Type I-B, ammonium sulfate suspension, ≥750 units/mg protein (E1%/280)

Type II-B, 20-80 units/mg protein (biuret)

Suitable for gel filtration, approx. MW 200,000

recombinant, expressed in proprietary host, lyophilized powder, ≥100 units/mg protein