The Alexa Fluor 594 donkey anti—rat IgG is labeled with our superior red-fluorescent Alexa Fluor 594 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 crossreactivity to bovine, chicken, goat, guinea pig, hamster, horse, human, mouse, rabbit and sheep serum proteins.