AF 568 DBCO

AF 568 DBCO is a DBCO-functionalized Alexa Fluor 568-type fluorescent labeling reagent designed for strain-promoted azide-alkyne cycloaddition (SPAAC) click chemistry. The dye provides strong red/orange fluorescence for tracking biomolecule conjugates, while the DBCO handle enables rapid, catalyst-free attachment to azide-bearing targets used in fluorescence microscopy, flow cytometry, and labeled probe construction.

1. Biomolecule Click Labeling

AF 568 DBCO is widely used to generate fluorescently labeled biomolecules through SPAAC click conjugation to azide-modified proteins, peptides, antibodies, and affinity reagents. Researchers incorporate the dye into labeling workflows to visualize binding events, follow reagent localization, and build fluorescent conjugates for assay development. The DBCO functionality supports efficient coupling under bioconjugation conditions that are commonly compatible with sensitive biomaterials, enabling straightforward preparation of red-channel imaging reagents without requiring copper catalysts.

2. Fluorescent Probe Construction

AF 568 DBCO serves as a practical fluorophore building block for fluorescent probe development where a reactive click handle is required for modular assembly. In chemical biology and molecular imaging workflows, the reagent is used to attach the Alexa Fluor 568 fluorophore to azide-functionalized probe scaffolds, targeting ligands, or carrier molecules, producing imaging reagents with a defined spectral output for multi-component experiments. This approach is frequently used when researchers need to swap targeting elements while keeping the same fluorescence reporter for consistent readout across probe variants.

3. Surface And Material Functionalization

AF 568 DBCO is used to fluorescently tag azide-functionalized surfaces and biomaterials, including polymer coatings, hydrogels, and nanoparticle platforms prepared with azide groups. Materials scientists and biomaterials researchers employ the dye to quantify surface coverage, monitor coating uniformity, and track material-associated binding in microscopy-based studies. The DBCO click handle enables post-functionalization labeling of materials that already contain azide functionality, supporting the creation of fluorescently readable constructs for materials characterization and imaging assays.

4. Flow Cytometry Labeling

AF 568 DBCO is employed to prepare red-fluorescent conjugates for flow cytometry workflows where azide-bearing biomolecules are available as labeling partners. Researchers use the reagent to stain cell-surface or extracellular targets after click conjugation, enabling multicolor panels that include a 568 nm-excited reporter for gating and quantitative analysis. This labeling strategy is particularly useful in reagent development when a stable, click-assembled fluorescent conjugate is preferred over direct dye-to-biomolecule coupling.