ammonium sulfate suspension, 10-20 units/mg protein

lyophilized powder, ≥20 units/mg protein (biuret)

lyophilized powder, ≥0.20 unit/mg solid

ammonium sulfate suspension, ≥100 units/mg protein

soluble powder, 75-150 units/mg solid

For use as a marker in SDS-PAGE

lyophilized powder, ≥3,000 W-A units/mg protein

≥95% (SDS-PAGE), specific activity ≥3,500 W-A units/mg protein, lyophilized powder