The Alexa Fluor 594 donkey anti—sheep 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 sheep. To minimize crossreactivity, it has been adsorbed against mouse, rabbit, bovine and human sera and human IgG.