AAT Bioquest"s iFluor(TM) dyes are developed for labeling proteins, in particular, antibodies. These dyes are optimized to have minimal fluorescence quenching effect on proteins and nucleic acids. Our iFluor(TM) 750 dyes have fluorescence excitation and emission maxima close to 750 nm and 780 nm respectively with good photostability. Our in-house comparable studies indicated that our iFluor(TM) 750 dyes are significantly brighter than the corresponding Cy7(R) and Alexa Fluor(R) 750. These spectral characteristics make them a superior alternative to Cy7(R) and Alexa Fluor(R) 750 (Cy7(R) and Alexa Fluor(R) are the trademarks of GE Healthcare and Invitrogen respectively). iFluor(TM) 780 conjugates have been widely used in fluorescence animal imaging applications. The iFluor(TM) 750 SE dye used in the kit is reasonably stable and shows good reactivity and selectivity with proteins. ReadiLink(TM) iFluor(TM) 750 Protein Labeling Kit provides a convenient method to label monoclonal, polyclonal antibodies or other proteins (>10 kDa). ReadiLink(TM) labeling kits require minimal hands-on time without a column purification steps. The kits provide all the essential components with only step of mixing and a simple spinning down. AAT Bioquest offers three different sizes to meet both exploration and research needs. This iFluor(TM) 750 labeling kit is optimized for labeling about 100 µg antibody.