Fluorescein (FAM) amine, isomerically pure dye (5-isomer). Unlike fluoresceinamine, this reagent contains a linker arm with an aliphatic amine group that is more reactive. It can react with electrophilic reagents like activated esters or epoxides, and be involved in enzymatic transamination.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.