Dyes and Fluorophores 

APTS is a very useful green fluorescent dye for labeling glycoproteins or sugar molecules in general. The labeling occurs via reductive amination which involves the formation of a Schiff base between the amine of APTS and the aldehyde or ketone of the sugar, followed by the reduction of the Schiff base linkage to a stable carbon-nitrogen bond. The multi-anionic nature of the dye makes it ideal for the studies of carbohydrate molecules by high resolution capillary electrophoresis.

• λ _Ex/λ _Em: 424/505 nm (before conjugation)
• Yellow solid soluble in water
• Store at 4°C and protect from light.
• C₁₆H₈Na₃O₉S₃
• MW: 523.39