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. <ul> <li>&lamba; _Ex/&lamba; _Em: 424/505 nm (before conjugation)</li> <li>Yellow solid soluble in water</li> <li>Store at 4°C and protect from light.</li> <li>C₁₆H₈Na₃O₉S₃</li> <li>MW: 523.39</li> <li>[196504-57-1]</li> </ul>