≥600 units/mg protein (biuret), ammonium sulfate suspension

buffered aqueous glycerol solution, 600-1000 units/mg protein (biuret)

ammonium sulfate suspension, 2000-4000 units/mg protein (modified Warburg-Christian)

ammonium sulfate suspension, 10-30 units/mg protein (modified Warburg-Christian)

Type I, 0.5-3.0 unit/mg solid (plus numerous enzyme activities associated with porcine heart)

Type IV, buffered aqueous glycerol solution, 3-20 units/mg protein

lyophilized powder, ≥3.0 units/mg solid

powder, white, ≥200 U/mg