The Alexa Fluor 514 goat anti-rabbit IgG is labeled with our bright, photostable, yellow/green-fluorescent Alexa Fluor 514 dye and is prepared from affinity-purified antibodies that react with IgG heavy chains and all classes of immunoglobulin light chains from rabbit. By using instruments that collect spectral distribution information, the signal from the Alexa Fluor 514 dye can be distinguished from both the Alexa Fluor 488 and Alexa Fluor 500 dyes.