4-Azide-TFP-Amide-SS-Sulfo-NHS consists of an aryl azide, a cleavable disulfide bond, and an NHS ester. The aryl azide can be photo-activated with UV light (250 to 350 nm) for conjugation with biomolecules. Fluoro helps to stabilize the free radical intermediate. The NHS ester reacts with amines. The disulfide bond can be cleaved by reducing agents.
