The Alexa Fluor 568 donkey anti - rabbit IgG is labeled with our bright, photostable, red-fluorescent Alexa Fluor 568 dye and is prepared from affinity-purified antibodies that react with IgG heavy chains and all classes of immunoglobulin light chains from rabbit. The donkey anti - rabbit IgG antibodies show minimum crossreactivity to bovine, chicken, goat, guinea pig, hamster, horse, human, mouse, rat and sheep serum proteins.