This anti-Texas Red® rabbit IgG antibody efficiently binds and quenches ~60% of the fluorescence of the Texas Red® dye. This antibody enables the use of the Texas Red® dye as a hapten instead of biotin. Unlike biotin, which is an endogenous ligand in mitochondria, dye-based haptens permit background-free staining of cells and tissues and a sensitive alternative to biotin-streptavidin methods.