Cyanine7 DBCO

Cyanine7 DBCO is a Cy7-family fluorescent labeling reagent combining a near-infrared cyanine dye with a DBCO (dibenzocyclooctyne) cyclooctyne handle for strain-promoted azide-alkyne cycloaddition (SPAAC). This design enables efficient, catalyst-free conjugation to azide-bearing biomolecules and surfaces while providing far-red fluorescence for sensitive imaging workflows, including microscopy and flow cytometry. The dye's strong emission in the Cy7 spectral region makes it well suited for multicolor experiments where reduced background from autofluorescence is advantageous.

1. Biomolecule Labeling

Cyanine7 DBCO is widely used to fluorescently tag azide-functionalized proteins, peptides, and other biomolecules in chemical biology and assay development. Researchers incorporate it into labeling workflows to generate defined Cy7-labeled conjugates for tracking binding events, monitoring reagent localization, and validating conjugate performance in fluorescence-based readouts. The DBCO group supports straightforward SPAAC coupling under conditions that are commonly compatible with biomolecule integrity, enabling rapid preparation of fluorescent probes without requiring copper catalysts.

2. Fluorescence Microscopy Imaging

Cyanine7 DBCO is employed in fluorescence microscopy to visualize azide-containing targets such as labeled cell-surface components, tagged biomaterials, or fluorescently marked macromolecules. In practice, investigators use Cy7 emission to improve contrast in imaging experiments where cellular autofluorescence can interfere with visible-channel dyes. The SPAAC-compatible DBCO functionality allows researchers to construct imaging reagents by first installing azides on the biological material of interest, then coupling Cyanine7 DBCO to produce a final NIR fluorescent imaging conjugate.

3. Flow Cytometry Dye Conjugates

Cyanine7 DBCO supports flow cytometry workflows that require far-red fluorescence for labeling and multicolor panel design. Common use cases include preparing Cy7-labeled conjugates for staining azide-bearing targets, including surface-labeled biomolecules or functionalized reagents used in cell characterization studies. Because the DBCO handle enables SPAAC coupling, researchers can generate Cy7-tagged reagents with controlled attachment to azide-functional partners, supporting consistent staining and enabling quantitative fluorescence readouts on standard cytometry instrumentation equipped for Cy7-channel detection.

4. Surface And Biomaterial Functionalization

Cyanine7 DBCO is used to create fluorescently traceable surfaces and biomaterials by coupling to azide-functionalized polymers, hydrogels, nanoparticles, and coatings. Materials scientists and biomaterials teams rely on the Cy7 signal to confirm surface modification, map reagent distribution, and monitor material-associated interactions in imaging experiments. The DBCO chemistry enables post-functionalization of azide-present substrates, allowing fluorescent tagging without introducing copper catalysts that could otherwise complicate sensitive material or biomolecule handling.