AF 647 azide

AF 647 azide is a fluorescent azide building block designed for copper-free click chemistry workflows that install Alexa Fluor 647-type emission into biomolecules and materials. As an azide-functionalized dye, it is commonly used to generate fluorescent conjugates via strain-promoted or related cycloaddition strategies, enabling robust far-red fluorescence readouts for microscopy, flow cytometry, and fluorescence-based assays. Its compatibility with labeling pipelines makes it a practical reagent for downstream probe and conjugate construction where a stable, bright far-red fluorophore is required.

1. Biomolecule Labeling

AF 647 azide is frequently used by chemical biology and protein engineering groups to fluorescently label biomolecules prepared with complementary click handles (e.g., cyclooctyne/DBCO- or related strained-alkyne tags). Researchers employ the resulting far-red conjugates for tracking binding interactions, monitoring biomolecule distribution, and building fluorescent reagents for mechanistic studies. This labeling approach is especially valued when users want to attach a defined dye payload to proteins, peptides, or other macromolecules under conditions that are compatible with sensitive biological samples.

2. Fluorescence Microscopy

AF 647 azide supports multicolor fluorescence microscopy workflows where far-red emission helps reduce spectral overlap and improves separation from common green/red channels. Imaging groups use click-assembled AF 647 conjugates to visualize labeled targets in fixed-cell imaging experiments and to follow biomolecule localization in cellular imaging studies. Because the dye is delivered as an azide functional group, it integrates cleanly into established click labeling pipelines used to generate fluorescent probes for microscopy reagent development.

3. Flow Cytometry Dye Conjugates

AF 647 azide is widely used in flow cytometry reagent development to produce far-red fluorescent conjugates for cell-surface or intracellular labeling strategies driven by click chemistry. Cytometry users incorporate the dye into antibody-like reagents, targeting ligands, or other binding constructs that have been pre-functionalized with a complementary click partner, enabling consistent fluorescent tagging for population analysis. The far-red spectral position is particularly helpful for multiplex panels where minimizing channel crosstalk is important for robust gating and imaging-to-flow assay workflows.

4. Nucleic Acid and Probe Construction

AF 647 azide is also used in nucleic acid analysis tool development, where oligonucleotides or nucleic-acid-associated constructs can be labeled through click chemistry to generate fluorescent detection reagents. Molecular biology and assay development teams use AF 647 azide-derived conjugates to create fluorescent oligo probes for microscopy readouts and fluorescence-based nucleic acid workflows that benefit from a far-red reporter. This approach is commonly selected when users want a defined dye attachment point using an azide handle as part of a modular probe-building strategy.