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Immunohistochemistry(IHC) is a well-established, highly specific and sensitive method that allows the localization of an antigen within a cell or any other biological tissue samples with high resolution. The bound antigen-antibody complexes are then visualized using chemically linked enzymes, dyes, or fluorescent labels.  The method combines molecular detection with morphological features and can be used on formalin-fixed paraffin-embedded (FFPE) tissue sections, frozen tissue sections, and any other cytological preparations.