Features: Advanced avidin/biotin technology: The Elite® ABC complex is smaller, very uniform, and highly active, allowing more accessibility for binding to a biotinylated target. HIghest sensitivity, low background: The VectaStain® Elite® ABC system is the most sensitive avidin/biotin-based peroxidase system. The Elite® ABC series is approximately 5 times more sensitive than the original VectaStain® ABC Kit with the same low background. Cost effective: HIgher sensitivity leads to lower cost per slide. Available without ("Standard" kit) or with biotinylated species-specific or universal secondary antibodies. Available in ready-to-use formats: Prediluted, stabilized working solutions of Elite® ABC Kit reagents provide the same high sensitivity and low background as the traditional VectaStain® Elite® ABC Kit reagents. Kit Contents: 2 ml Reagent A, 2 ml Reagent B, 1 ml biotinylated goat anti-human IgG, 3 ml normal goat serum. Kit contains sufficeint reagents to stain approximately 500-1000 sections.