Type IV, 2.0-6.0 units/mg solid

Type VI, 5-12 units/mg solid

lyophilized powder, 20-30 units/mg protein

For use as a marker in SDS-PAGE

lyophilized powder, ≥20 units/mg protein

lyophilized powder; Protein: 35-65% modified Warburg-Christian; 3.0-15.0 units/mg protein (in the presence of adequate α-lactalbumin, without added α-lactalbumin the activity is zero)

lyophilized powder, ≥100 units/mg protein

recombinant, expressed in E. coli, lyophilized powder, ≥45 units/mg solid