Three times crystallized and treated with 1-chloro-3-tosylamido-7-amino-2-heptanone (TLCK) to inhibit trypsin activity [Shaw, et al., Biochemistry, 4, 2219, (1965)]. Dialyzed to remove autolysis products and low molecular weight contaminants. Supplied as lyophilized powder.
Actividad: ≥45 unidades per milligram protein