MB 488 Alkyne is a fluroescent agent with a terminal propargyl group. The alkyne in this linker can react with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry reaction. MB 488 NHS ester is a green fluorescent, very hydrophilic dye molecule that has a maximal absorption of 501 nm and emission at 524 nm. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.