The highly stable bond between avidin (A) and biotin (B) can be used to form a complex (ABC) between a biotinylated protein or other target and an avidin-conjugated detection enzyme. With more than 50,000 citations, Vector Laboratories ABC kits are trusted by immunohistochemistry (IHC) and immunocytochemistry (ICC) laboratories. Different variations of the ABC kit system can accommodate a wide array of targets and tissue species. This VECTASTAIN Elite ABC-HRP Kit (Peroxidase, Anti-Mouse, Anti-Rabbit IgG) features a small, highly active avidin/biotin-HRP complex for superior target access and sensitivity. Typical sensitivity is 5X higher than the original ABC kits. The kit includes 2 ml of biotinylated, affinity-purified horse anti-mouse and anti-rabbit IgG antibodies, 2 ml Reagent A (avidin) and 2 ml Reagent B (biotinylated HRP) and 3 ml normal horse serum. Stains 500-1000 sections.