This protein labeling kit comprises our superior near-IR fluorescent dye CF680R in succinimidyl ester form and other necessary materials for labeling 3×1 mg antibody. CF680R is a bright and exceptionally photostable near-IR dye. Although CF680R is not as bright as CF680, it is still among the brightest 680 nm dyes. However, the most important feature of CF680R is its unrivaled photostability. This makes CF680R ideal for applications that demand both brightness and photostability. CF680R is not suitable for labeling streptavidin due to fluorescence quenching. Please download the CF680R dye flyer for more details.