MTS-TAMRA (MTS-5(6)-carboxytetramethylrhodamine, mixed isomers) is a fast-reacting and highly selective thiol-reactive label that permits one to attach the popular fluorescent dye carboxytetramethylrhodamine to a thiol group. &lamba;Ex/&lamba;Em (MeOH) = 540/565 nm Red solid soluble in DMF or DMSO Store at -20°C and protect from light C28H29N3O6S2 MW: 567