5' JOE 40 nmol scale, 1 modification

JOE fluorophore is a chlorinated fluorescein with fluorescence characteristics red-shifted as compared to fluorescein.
JOE fluorescent dye is one of the traditional fluorophores used in automated DNA sequencing.
It is also commonly used as reporter dye for multiplex Real-Time qPCR.
JOE is an alternative to HEX dye.