Monoclonal mouse anti-fluorescein reacts with the fluorescein moiety of FITC and FAM. This product is prepared by labeling high quality monoclonal mouse anti-fluorescein IgG (H+L) with the green fluorescent dye CF488A. CF488A is a superior alternative to the traditional green fluorescent dye FITC (or fluorescein) owing to its exceptional brightness and photostability. CF488A has brightness and photostability comparable to Alexa Fluor? 488.