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Catalog#: 1307-1
Unit size: 1 mg
In stock
Catalog#: 1307-5
Unit size: 5 mg
In stock
Catalog#: 1307-25
Unit size: 25 mg
In stock
Catalog#: 1307-100
Unit size: 100 mg
In stock

Cy3 DBCO (also sold under Sulfo-Cyanine3 DBCO) is a bright, water-soluble, and pH insensitive from pH 4 to pH 10 orange-fluorescent dye. Cy3 conjugates of antibodies, peptides, and proteins can be excited using the 532 nm or 555 nm laser line and visualized with TRITC (tetramethylrhodamine) filter sets. Cy3 conjugates give less background than TAMRA and most other commonly used fluorescent dyes.

Cy3 DBCO is a bright, orange-fluorescent, pH insensitive azide-reactive probe routinely used for imaging of azide-containing biomolecules without the need for copper catalyst. Cy3 DBCO reacts with azides via a copper-free “click chemistry” reaction to form a stable triazole and does not require Cu-catalyst or elevated temperatures. In application where the presence of copper is a concern Cy3 DBCO is an ideal alternative to copper requiring fluorescent alkynes.

Azide, picolyl azide
Abs/Em Maxima
555/572 nm
Extinction coefficient
150,000 cm-1M-1
Water, DMSO, DMF
Spectrally similar dyes
Cy3, DyLight® 555, Alexa Fluor® 555
Molecular weight
Storage conditions
Shipping conditions
Ambient temperature

Cy®Dye is a trademark of GE Healthcare.