Cyanine3 DBCO

Cyanine3 DBCO is a Cy3-class fluorescent dye equipped with a DBCO (dibenzocyclooctyne) click handle, enabling copper-free strain-promoted azide-alkyne cycloaddition for fluorescent labeling. This reagent is designed for attaching bright, visible-range fluorophores to azide-bearing biomolecules, polymers, and biomaterials, supporting fluorescence microscopy, imaging probe construction, and fluorescence-based assays where robust post-labeling conjugation is required.

1. Biomolecule Fluorescent Labeling

Cyanine3 DBCO is used by chemical biology and bioconjugation groups to fluorescently tag azide-functional proteins, peptides, antibodies, and other biomolecules for downstream imaging and quantification workflows. Researchers commonly incorporate it into labeling strategies that require copper-free click chemistry to preserve biomolecule integrity and maintain compatibility with sensitive samples. The Cy3 fluorophore supports standard fluorescence readouts in visible channels, making the conjugates practical for microscopy-based localization studies and fluorescence assay development.

2. Fluorescence Microscopy Imaging

Cyanine3 DBCO is frequently employed in fluorescence microscopy workflows to visualize azide-present targets in fixed-cell and biomaterial contexts, including labeled cell-surface components and azide-functional extracellular matrices. Imaging teams use the DBCO handle to rapidly generate Cy3-labeled conjugates after azide installation, enabling flexible experimental design for multi-step staining or probe assembly. This approach is particularly useful when fluorescent labeling is performed as a late-stage step to reduce perturbation of the biological system prior to imaging.

3. Flow Cytometry Dye Conjugates

Cyanine3 DBCO supports flow cytometry workflows where azide-functional biomolecules are converted into Cy3-labeled reagents for cell-associated fluorescence measurements. Cytometry users often choose this click-based labeling route to produce consistent, modular fluorescent conjugates for staining panels, binding assays, and cellular binding readouts. The Cy3 emission profile aligns with common cytometer filter sets in the visible range, enabling integration into established fluorescence analysis pipelines.

4. Biomaterial And Surface Functionalization

Cyanine3 DBCO is applied in biomaterials science and surface engineering to generate Cy3-labeled coatings and imaging-compatible materials from azide-functional surfaces, hydrogels, and polymer scaffolds. Materials researchers use the DBCO click handle to attach the fluorophore to azide-bearing substrates under mild conditions, supporting visualization of functionalized surfaces, tracking of material distribution, and development of fluorescently labeled scaffolds for microscopy-based characterization.