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  1. Antigen Retrieval Protocol (PIER): Novus Biologicals

    Proteolytic-Induced Epitope Retrieval (PIER) is an enzymatic method of antigen retrieval which relies on enzymes such as proteinase K, trypsin, or pepsin to unmask antigen.

  2. IHC Antigen Retrieval | Proteintech Group - ptglab

    Learn about the 2 types of antigen retrieval: heat-induced epitope retrieval (HIER) and proteolytic-induced epitope retrieval (PIER)

  3. Antigen Retrieval Protocol (PIER) - Bio-Techne

    View our protocol on Antigen Retrieval Protocol (PIER). Featuring full methods and resources.

  4. Antigen retrieval and permeabilization for IHC - Abcam

    To identify the best method for your specific antigen, we recommend testing two methods of HIER, for example, citrate buffer pH 6 and Tris-EDTA pH 9, and one or two methods of PIER, for example, …

  5. PIER, HIER and Mannich: Antigen Retrieval in Immunohistochemistry

    Jun 8, 2025 · The three most common enzymes used in ‘Proteolytic Induced Epitope Retrieval’ (or ‘PIER’) are Trypsin, Pepsin and Proteinase K. Trypsin works well for most tissue types and with most …

  6. Protease-induced Antigen Retrieval Protocol | Rockland

    The two methods of antigen retrieval are either protease-induced epitope retrieval (PIER) or heat-induced epitope retrieval (HIER). Both serve to break the methylene bridges and expose the …

  7. Optimize Antigen Retrieval: HIER vs. PIER | Boster Bio

    Compare HIER vs. PIER antigen retrieval methods for IHC. Learn expert tips, protocols, and buffer recommendations to enhance your immunostaining results.