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发表于 2017-7-24 19:28:56
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CFSE (5(6)-Carboxyfluorescein N-hydroxysuccinimidyl ester) is a cell permeant, non-fluorescent pro-dye. Intracellular esterases in live cells cleave the acetate groups which results in the green fluorescent molecule carboxyfluorescein that is now membrane impermeant. The succinimidyl ester group reacts indiscriminately with intracellular free amines to generate covalent dye-protein conjugates. The result is live cells with an intracellular fluorescent label. At appropriate concentrations CFSE is non-toxic to cells and the fluorescence is retained after formaldehyde and alcohol fixation. CFSE labeled cells can be detected with any instrument or filter set compatible with fluroescein detection: Excitation(max)=492nm, Emission(max)=517nm. |
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