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 CF405M dye. CF405M is a blue fluorescent dye spectrally similar to Pacific Blue dye. CF405M is as bright as Pacific Blue dye but is significantly more photostable than the latter. An additional advantage of CF405M is that it has less spillover in the 525/50 green channel than Pacific Blue dye due to narrower emission peak, making CF405M a superior choice in multi-color detection applications. We also offer CF405S, another 405 nm-excitable dye with an even shorter emission wavelength (See the CF405S Flyer for details).