Features: Rapid protocol: Staining in less than 20 minutes following primary antibody incubation. Working solutions can be used immediately after dilution. High sensitivity, low background. Biotinylated, Universal Pan-Specific secondary antibody recognizes mouse, rabbit, and goat primary antibodies as well as those from related species such as rat, bovine, and sheep. Available in Ready-To-Use (R.T.U) format: Prediluted, stabilized working solutions of VectaStain® Universal Quick Kit reagents provide the same high sensitivity and low background as the concentrated VectaStain® Universal Kit. Do not use the pan-specific secondary antibody to stain rat, mouse or other rodent, rabbit, goat, bovine, or sheep tissue due to potential reactivity with endogenous IgG. Kit Contents: Each of the stabilized, prediluted reagents are supplied in dropper bottles. 50 ml 2.5% normal horse serum, 50 ml prediluted, biotinylated, universal pan-specific (anti-mouse/rabbit/goat IgG) secondary antibody, 50 ml prediluted peroxidase-streptavidin complex. Sufficient reagents to stain approximately 250-500 sections.