Rhodamine 6G (R6G) is a xanthene dye of rhodamine series that has been used for the labeling of oligonucleotides and DNA for quite a long time. Just like other xanthenes, R6G comes as two isomers, 5- and 6-isomer. Even though their absorption and emission spectra are virtually indistinguishable, the isomers need to be separated to avoid separation of the labeled molecules during their purification, i.e. double HPLC peaks and double spots on electrophoresis.

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R6G phosphoramidite, 6-isomer
ROX alkyne, 5-isomer
ROX azide, 5- isomer
ROX DBCO, 5-isomer
ROX maleimide, 5-isomer
ROX NHS ester, 5-isomer
ROX NHS ester, 6- isomer
ROX reference dye for qPCR
SIMA phosphoramidite, 6-isomer
SIMA phosphoramidite, 6-isomer (hydroxyprolinol)
SIMA-dT phosphoramidite, 6-isomer
TAMRA alkyne, 5-isomer