Product Description: TAMRA-PEG2-N3 is a dye derivative of TAMRA (HY-135640) containing 2 PEG units. TAMRA-PEG2-N3 Molecules containing Alkyne groups (N3) undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc). Strain-promoted alkyne-azide cycloaddition (SPAAC) can also occur with molecules containing DBCO or BCN groups.