Ready-to-use endopeptidase (alkaline protease) of the serine protease family and cleaves protein in the tissue section, allowing primary antibodies to recognize and bind target epitope(s). The reagent is intended for enzymatic digestion of sections of formalin-fixed, paraffin embedded tissue. With 0.5 units/ml alkaline protease enzyme activity, Protease 1 is Ventana's strongest enzymatic pretreatment available for IHC. For use on NexES IHC and BenchMark Series automated slide stainers. Single, ready-to-use dispenser.