Proteinase K is a non-specific protease. It is stable over a wide pH and activity can be stimulated by addition of denaturing agents SDS and urea. Proteinase K is not completely inactivated by autolysis and some enzyme fragments maintain proteolytic activity even after extensive autolysis. Our products are manufactured and quality tested to the highest standards. You can be assured of their consistent purity and activity from one experiment and assay to the next, day after day.