This highly cross-adsorbed Alexa Fluor 633 goat anti—rabbit IgG is labeled with our far-red—fluorescent Alexa Fluor 633 dye and is prepared from affinity-purified antibodies that react with IgG heavy chains and all classes of immunoglobulin light chains from rabbit. To minimize crossreactivity, it has been adsorbed against bovine IgG, goat IgG, mouse IgG, rat IgG and human IgG.