>Last year, Roger Tsien has described a new approach to a fluorescent
>vital dye for specific proteins. It involves tagging the protein with a
>small tag which then serves as a target for a fluorescent pro-ligand:
>> 4',5'-bis(1,3, 2- dithioarsolan-2-yl)fluorescein
>>Griffin BA, Adams SR & Tsien RY. (1998). Specific covalent labeling of
> recombinant protein molecules inside live cells. Science 281, 269-272.
>>Has anybody had luck with this new approach?
Also, is this dye available commercially?