ammonium sulfate suspension, ≥9 units/mg protein

for enzyme immunoassay, lyophilized, powder, ~140 U/mg

Grade III, lyophilized powder, ≥0.15 units/mg protein

lyophilized powder, ≥500 units/mg protein

ammonium sulfate suspension, 1.0-3.0 units/mg protein (modified Warburg-Christian)

aqueous glycerol suspension, ≥500 units/mg protein (biuret)

≥8.0 units/mg solid

Grade VIII, lyophilized powder, ≥500 units/mg protein