Background: Granzyme B is serine proteases that mediate apoptotic signaling in cytotoxic T lymphocytes (CTL) and in natural killer (NK) cells. Granzyme B is synthesized as inactive proenzymes, and they arestored within cytolytic granules and released by effector cells during degradation. Recent studies have demonstrated that the expression of granzyme B by immunohistochemistry in several entities of extranodal peripheral T cell lymphoma (PTCL) and NK cell lymphomas, including nasal and nasal-type NK/T cell lymphomas, hepatosplenic and non-hepatosplenic PTCL, enteropathy-type (ETCL) and non-ETCL intestinal PTCL, subcutaneous panniculitis-like PTCL (SPTCL), cutaneous CD8+ epidermotropic lymphomas as well as in nodal and cutaneous CD30+ anaplastic large cell lymphomas (ALCL). The expression of cytotoxic proteins, such as granzyme B may be important for the identification and classification of extranodal T- and NK-cell lymphomas since many of these tumors do not have specific morphology and phenotype. Subcellular location: Cytoplasm Recommended method: Heat induced epitope retrieval with Tris-EDTA buffer (pH 9.0), primary antibody incubate at RT (18°C-25°C) for 30 minutes. Immunogen: Synthetic peptide corresponding to Granzyme B residues within aa100-200 of Granzyme B was used as an immunogen. Storage Buffer: PBS 59%, Sodium azide 0.01%, Glycerol 40%, BSA 0.05%. Storage conditions: -25°C to -18°C Storage instructions: Shipped on blue ice. Upon delivery, aliquot, and store at -25°C to -18°C. Avoid freeze / thaw cycles. Recommended Dilutions: IHC-P: 1:100-1:200 Background References: 1. Froelich CJ, et.al, J Immunol. 1993 Dec 15;151(12):7161-71. 2. Hodge G, et.al, Clin Exp Immunol. 2014 Oct;178(1):79- 85. Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections analysis of spleen tissue labelling granzyme B with BP6029. Heat mediated antigen retrieval was performed using Tris/EDTA buffer pH 9.0
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