6-JOE-SE single isomer 5 mg

6-Carboxy-4',5'-dichloro-2',7'-dimethoxyfluorescein succinimidyl ester

6-Carboxy-4',5'-dichloro-2'7'-dimethoxyfluorescein NHS ester, single isomer (6-JOE-SE). Amine-reactive fluorescein dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 523nm (? = 75.000 M-1cm-1), Em: 548nm). This single isomer, amine-reactive, fluorescein derivative is used as an orange fluorescent derivatization reagent for covalently labeling proteins and alkylamino modified nucleic acids.