Cy3-SE is a hydrophilic amine-reactive fluorescent probe.1,2 It displays excitation/emission maxima of 550/570 nm, respectively. It has commonly been used to label nucleic acids.
1.Randolph, J.B., and Waggoner, A.S.Stability, specificity and fluorescence brightness of multiply-labeled fluorescent DNA probesNucleic Acids Res.25(14)2923-2929(1997) 2.Harvey, B.J., and Levitus, M.Nucleobase-specific enhancement of Cy3 fluorescenceJ. Fluoresc.19(3)443-448(2009)