ICG PEG N3 (MW 10000) is an indocyanine green (ICG) azide fluorophore used for labeling amino groups in peptides, proteins, and oligonucleotides. This compound acts as a click chemistry reagent, featuring an azide group that can undergo copper-catalyzed azide-alkyne cycloaddition reactions (CuAAC) with alkyne-containing molecules. Additionally, it can participate in strain-promoted azide-alkyne cycloaddition reactions (SPAAC) with molecules bearing DBCO or BCN groups, and it exhibits excitation/emission at 785/813 nm.
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