Description Proteinase K Antigen Retrieval Kit is designed to break the protein cross-links, therefore unmask the antigens and epitopes in formalin-fixed and paraffin embedded tissue sections, thus enhancing staining intensity of antibodies. Application Unmask the antigens and epitopes for IHC/IF or in situ TUNEL assay Contents Proteinase K Stock Solution (20×) ————–10ml Proteinase K Dilution Buffer———————200ml Storage Proteinase K Stock Solution (20×) and Proteinase K Dilution Buffer can be aliquoted and stored at –20 ºC for 2-3 years.