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