CF® Dye Maleimides are thiol-reactive fluorescent dyes. Maleimides are commonly used to label proteins on free thiol groups. CF® dyes are Biotium's line of next-generation fluorescent dyes with advantages in brightness, photostability, and conjugate specificity compared to other fluorescent dyes. • UV-excitable blue fluorescent CF®350 dye has excitation/emission at 347/448 nm. • Blue fluorescent CF®405M dye has excitation/emission at 408/452 nm. • Green fluorescent CF®488A dye has excitation/emission at 490/515 nm. • Orange-red fluorescent CF®555 dye has excitation/emission at 555/565 nm. • Red fluorescent CF®568 dye has excitation/emission at 562/583 nm. • Deep-red fluorescent CF®594 dye has excitation/emission at 593/614 nm. • Far-red fluorescent CF®633 dye has excitation/emission at 630/650 nm. • Far-red fluorescent CF®647 dye has excitation/emission at 650/665 nm • Far-red fluorescent CF®660C dye has excitation/emission at 667/685 nm. • Far-red/near-IR fluorescent CF®770 dye has excitation/emission at 681/698 nm. • Blue fluorescent CF®405S dye has excitation/emission at 404/431 nm. • Far-red fluorescent CF®660R dye has excitation/emission at 663/682 nm. • Far-red/near-IR fluorescent CF®680R dye has excitation/emission at 680/701 nm. • Red/far-red fluorescent CF®620R dye has excitation/emission at 617/639 nm. • Far-red fluorescent CF®640R dye has excitation/emission at 642/662 nm. • Orange fluorescent CF®543 dye has excitation/emission at 541/560 nm. • Orange fluorescent CF®532 dye has excitation/emission at 527/558 nm. • 405 nm-excitable green fluorescent CF®405L dye has excitation/emission at 395/545 nm. • CF®430 is a bright, photostable, 405 nm-excitable green fluorescent dye (excitation/emission 426/498 nm). • CF®440 is a bright, photostable, 405 nm-excitable green fluorescent dye (excitation/emission 440/515 nm). • Near-infrared fluorescent CF®800 dye has excitation/emission at 797/816 nm. • 405 nm-excitable green fluorescent CF®450 dye has excitation/emission at 450/538 nm. • Red fluorescent CF®570 dye has excitation/emission at 568/591 nm. • Red fluorescent CF®583 dye has excitation/emission at 583/606 nm. • Near-infrared fluorescent CF®750 dye has excitation/emission at 755/777 nm. • Near-infrared CF®820 dye has excitation/emission at 822/835 nm. • Red fluorescent CF®550R dye has excitation/emission at 551/577 nm. • Green fluorescent CF®503R dye has excitation/emission at 503/532 nm. • Red fluorescent CF®583 dye has excitation/emission at 583/606 nm. • Near-infrared fluorescent CF®790 dye has excitation/emission at 784/806 nm.