MB 543 Maleimide is a fluroescent agent with a terminal Maleimide group. MB 543 Maleimide very hydrophilic, water-soluble orange fluorescent dye that has a maximal absorption of 543 nm and emission at 566 nm. The compound is also pH insensitivity from pH 3 to pH 10. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.