sulfo-Cyanine7 DBCO

Sulfo-Cyanine7 DBCO is a water-soluble cyanine dye conjugated to a DBCO (dibenzocyclooctyne) click handle, enabling copper-free strain-promoted azide-alkyne cycloaddition for rapid labeling of biomolecules and biomaterials. Its near-infrared fluorescence supports low-background optical tracking in biological workflows, while the sulfonated dye scaffold improves aqueous compatibility for bioconjugation and imaging reagent development.

1. Biomolecule Click Labeling

Sulfo-Cyanine7 DBCO is frequently used by chemical biology and imaging labs to fluorescently label azide-functionalized proteins, peptides, antibodies, and affinity ligands via copper-free click chemistry. Researchers incorporate the reagent into labeling workflows where fast conjugation, compatibility with sensitive biomolecules, and aqueous handling are important, such as preparing fluorescent conjugates for binding studies, cell-surface binding assays, and imaging reagent screening. The DBCO functionality provides a high-yield route to install the Cyanine7 fluorophore onto azide-bearing targets without requiring copper catalysts that can complicate downstream biological assays.

2. Cell-Surface Imaging Probes

Sulfo-Cyanine7 DBCO is commonly applied to build near-infrared fluorescence imaging probes for monitoring cell-surface or extracellular components after introducing azide groups on the cell exterior. In microscopy and optical imaging workflows, investigators use the reagent to generate fluorescent conjugates that can be tracked with standard fluorescence imaging systems tuned for Cyanine7 emission. This approach is particularly useful in experiments that require rapid probe assembly, such as time-sensitive labeling prior to imaging, and where the sulfonated dye helps maintain reagent behavior in aqueous buffers used for staining and wash steps.

3. Biomaterial Surface Functionalization

Sulfo-Cyanine7 DBCO is also used in biomaterials research to fluorescently tag or visualize azide-functionalized hydrogels, polymer scaffolds, and nanoparticle surfaces. Materials scientists and biomaterials engineers employ the reagent to create near-infrared fluorescent readouts for surface coating verification, spatial mapping of functional layers, and tracking of material interactions in complex biological media. Because the click handle reacts under copper-free conditions, it is often integrated into workflows where maintaining material integrity and minimizing catalyst-related effects are practical considerations for subsequent imaging experiments.

4. Fluorescent Conjugate Standards

Sulfo-Cyanine7 DBCO supports the preparation of well-defined Cyanine7-labeled conjugates used as reference materials in fluorescence-based assay development and instrument qualification. Researchers use the reagent to generate consistent fluorescent labeling for method optimization, workflow controls, and calibration-like comparisons across imaging and detection setups that monitor near-infrared signals. In these contexts, the DBCO click functionality helps streamline conjugate construction from azide-tagged components while keeping the fluorescent dye in an aqueous-compatible form for routine laboratory handling.