Alexa Fluor® 488 Donkey Anti-Rat IgG Antibody is labeled with our bright, photostable, green-fluorescent Alexa Fluor® 488 dye and is prepared from affinity-purified antibodies that react with IgG heavy chains and all classes of immunoglobulin light chains from rat. The donkey anti-rat IgG antibodies show minimum cross-reactivity to bovine, chicken, goat, guinea pig, hamster, horse, human, mouse, rabbit, and sheep serum proteins.