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, e.g. horseradish peroxidase (HRP). 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, Standard) 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 Reagent A (avidin) and 2 ml Reagent B (biotinylated HRP) and can be used to detect any biotinylated target, from biotinylated secondary antibodies on tissue sections or western blots to neuronal tracers containing biotin. Stains 500-1000 sections.