VECTASTAIN Elite ABC-HRP Kit, Peroxidase (Mouse IgG), 1 Kit. The VECTASTAIN Elite ABC system is the most sensitive avidin/biotin-based peroxidase system and is approximately 5 times more sensitive than the original VECTASTAIN ABC Kit with the same low background. It is available with a biotinylated anti-mouse IgG secondary antibody. Advanced avidin/biotin technology: The Elite ABC complex is smaller, very uniform, and highly active, allowing more accessibility for binding to a biotinylated target. Cost effective: Higher sensitivity leads to lower cost per slide. Kit contains sufficient reagents to stain approximately 500–1000 sections.