ATTO 647N alkyne

ATTO 647N alkyne is a click-reactive ATTO 647N fluorophore bearing an alkyne handle for copper-catalyzed azide-alkyne cycloaddition (CuAAC). This dye is engineered for bright far-red fluorescence, making it a common labeling component in fluorescence microscopy, flow cytometry, and multicolor imaging workflows where robust spectral separation is required. The alkyne functionality enables straightforward incorporation into biomolecule conjugates, affinity reagents, and functional materials via downstream click coupling to azide-bearing partners.

1. Biomolecule Labeling

ATTO 647N alkyne is used by chemical biology and glycobiology groups to install far-red fluorescence onto proteins, peptides, and other biomolecules through CuAAC with azide-functional targets. Researchers typically pair the dye with azide-bearing antibodies, ligands, or biomolecular scaffolds to generate fluorescent conjugates for localization studies, binding assays, and tracking experiments. The alkyne handle supports modular probe construction, allowing the same fluorophore to be transferred onto different azide-functional biomolecules without changing the optical readout.

2. Click-Constructed Imaging Probes

ATTO 647N alkyne serves as a versatile building block for fluorescence imaging probe development, particularly when a far-red reporter is needed for multiplexing or reduced background in complex samples. In microscopy and imaging reagent workflows, teams use the alkyne to click-graft the dye onto azide-functional targeting moieties, polymer backbones, or nanoparticle surfaces to create imaging-ready conjugates. This approach is frequently used to standardize probe brightness across a series of constructs while keeping the labeling chemistry consistent for rapid iteration in assay and imaging development.

3. Surface And Material Functionalization

ATTO 647N alkyne is also applied in biomaterials science for fluorescent surface modification and material labeling via click coupling to azide-functional coatings, hydrogels, or scaffold materials. Researchers use the dye to visualize material distribution, coating uniformity, or surface-bound architectures under fluorescence microscopy and related optical readouts. The ability to attach the far-red fluorophore through the alkyne handle supports reproducible fabrication of labeled surfaces and conjugated materials used in cell-material interaction studies and imaging-based characterization.

4. Multicolor Flow Cytometry

ATTO 647N alkyne is commonly incorporated into fluorescent labeling strategies for flow cytometry panels where far-red emission provides spectral separation from common green and orange channels. By clicking the dye onto azide-functional biomolecules such as targeting reagents or secondary labeling components, investigators generate conjugates that report on binding, uptake, or surface association in single-cell analysis workflows. The alkyne-enabled modular conjugation supports consistent reagent preparation across experiments, which is particularly valuable when building multicolor assays for phenotyping or biomarker screening in research settings.