buffered aqueous solution, 10-40 units/mg protein (biuret)

lyophilized powder, 5-15 units/mg protein

lyophilized powder, 8-20 units/mg solid

lyophilized powder, ≥10 units/mg solid

lyophilized powder, 40-80 units/mg solid, pH 8.1

lyophilized powder, ≥70 units/mg solid

from cow milk

Type VII, lyophilized powder, ≥100,000 units/g solid (without added oxygen)