5-Propargylamino-dCTP-ATTO-550

5-Propargylamino-dCTP-ATTO-550 is a fluorophore-labeled nucleotide analog designed for click-chemistry-compatible incorporation into nucleic acid workflows, pairing ATTO 550 fluorescence with a propargyl handle for subsequent bioorthogonal conjugation. In practice, researchers use this reagent to build fluorescently tagged DNA or RNA constructs and to enable downstream attachment of additional reporters, affinity handles, or surface ligands via alkyne-azide click coupling. The ATTO 550 signal supports fluorescence microscopy and fluorescence-based nucleic acid readouts, while the propargylamino functionality expands labeling flexibility for probe and material development.

1. Fluorescent Nucleic Acid Labeling

5-Propargylamino-dCTP-ATTO-550 is used to generate fluorescently labeled DNA or RNA for visualization and analysis in molecular biology and chemical biology labs. By incorporating the ATTO 550-bearing nucleotide analog during nucleic acid synthesis, researchers obtain an internal fluorescent tag that can be tracked in gel-based workflows, fluorescence imaging of nucleic acid bands, and microscopy-based studies of labeled constructs. This approach is particularly useful when a stable, covalently integrated fluorophore is preferred over post-labeling strategies, and when the propargyl handle provides a built-in pathway for later functionalization of the same nucleic acid.

2. Click-Functional Nucleic Acid Probes

5-Propargylamino-dCTP-ATTO-550 supports modular probe engineering by providing an alkyne handle for subsequent azide-based click conjugation. After fluorescent nucleic acid incorporation, the propargyl group enables attachment of complementary azide reagents such as biotinylated tags for affinity capture, polymer or surface linkers for immobilization, or additional fluorophores for multicolor assay design. This workflow is commonly applied in nucleic acid probe development where researchers need both a fluorescence readout from ATTO 550 and a convenient chemical handle to position the probe on arrays, beads, or engineered biomaterials.

3. Fluorescence Microscopy Tracking

5-Propargylamino-dCTP-ATTO-550 is leveraged for fluorescence microscopy applications that require labeled nucleic acids in cellular or biomaterial contexts. Researchers incorporate the ATTO 550 nucleotide analog to create fluorescent DNA/RNA constructs that can be imaged to follow localization, hybridization behavior, or trafficking of nucleic acid components in imaging experiments. The propargyl functionality further allows post-synthetic conjugation to targeting moieties or imaging partners when a single fluorophore label is not sufficient for the experimental design.

4. Biomaterial Surface Immobilization

5-Propargylamino-dCTP-ATTO-550 is applied in biomaterials research to immobilize fluorescent nucleic acids onto functional surfaces using click chemistry. After nucleic acid labeling with ATTO 550, the alkyne handle can be used to couple nucleic acids to azide-functional coatings, enabling fabrication of nucleic acid-based materials such as capture layers, patterned probes, or chemically defined hybridization surfaces. This strategy is frequently used in assay development and materials characterization where covalent attachment and fluorescence-based verification of surface loading are important for workflow robustness.