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Vina Green is a novel permanent chromogen that produces a green stain in the presence of horseradish peroxidase (HRP). The kit consists of liquid Vina Green chromogen and buffer that are stable, when mixed, for at least 4 hours at room temperature. Vina Green is clearly distinguishable from Warp Red and DAB on a single slide, enabling high flexibility for its application in Multiplex IHC™. Vina Green is suitable for both immunohistochemistry (IHC) and in situ hybridization (ISH) applications including HPV, CMV, EBV, Kappa, Lambda, p63, HMWCK, TTF-1, Ki-67, and other targets/antigens such as blood and lymphatic vessels, and basal and myoepithelial cells. The reaction product is insoluble in alcohols and xylene and, therefore, a variety of counterstains and permanent mounting media can be used with this chromogen kit.