| abstract |
A long-wavelength narrow emission bandwidth fluorescein dye is provided for detecting a spatially overlapping target substance. A long wavelength narrow emission bandwidth fluorescein dye is provided for detecting spatially overlapping target substances. This dye consists of 4,7-dichlorofluorescein, and in particular 2 ', 4', 5 ', 7'-tetrachloro-4,7-dichloro-5- (and 6-) carboxyfluorescein. Methods and kits are provided for using this dye for DNA analysis. [Selection figure] None |