5-Propargylamino-dCTP-Cy3 (ethyl)

5-Propargylamino-dCTP-Cy3 (ethyl) is a Cy3-labeled, alkyne-bearing dCTP analog designed for fluorescent nucleic acid labeling workflows. The propargylamino functionality enables post-incorporation click chemistry handle introduction, while the Cy3 reporter provides bright red fluorescence for visualization and readout in nucleic acid assays. Researchers use this reagent to generate fluorescently tagged DNA products for microscopy, gel-based analysis, and fluorescence-enabled nucleic acid detection formats where a Cy3 signal is compatible with standard filter sets and imaging instrumentation.

1. DNA Click Labeling

5-Propargylamino-dCTP-Cy3 (ethyl) is used to prepare fluorescently labeled DNA and DNA-derived probes for downstream click-based conjugation strategies. In chemical biology and assay development labs, the Cy3 reporter supports direct fluorescence tracking of the labeled nucleic acid, while the propargylamino handle provides a convenient functional handle for coupling to azide-bearing biomolecules, affinity tags, or solid supports. This combination is particularly useful when researchers want to build modular nucleic acid conjugates for imaging workflows or to immobilize DNA for surface-based binding studies.

2. Fluorescent PCR And Amplification

5-Propargylamino-dCTP-Cy3 (ethyl) is applied in fluorescence-enabled nucleic acid amplification experiments where incorporation of the Cy3-labeled nucleotide yields an intrinsically fluorescent DNA product. Molecular biology and diagnostics research groups often use Cy3-labeled DNA readouts for monitoring amplification products by fluorescence imaging and gel electrophoresis, enabling rapid assessment of labeling and product integrity. Because the reagent is a dCTP analog, it integrates into DNA synthesis contexts that require a cytosine-containing nucleotide contribution to the fluorescent signal.

3. Probe Construction For Hybridization

5-Propargylamino-dCTP-Cy3 (ethyl) supports the development of fluorescent DNA probes used in hybridization-based detection workflows. Researchers in genomics and molecular diagnostics research commonly incorporate Cy3-labeled nucleotides into oligonucleotides or PCR products to generate probe sets for fluorescence microscopy readouts and fluorescence-based nucleic acid analysis. The resulting Cy3 fluorescence enables direct visualization of hybridization targets without requiring separate dye conjugation steps, which can simplify probe preparation for screening and validation experiments.

4. Microscopy-Based Nucleic Acid Imaging

5-Propargylamino-dCTP-Cy3 (ethyl) is used to visualize nucleic acid localization in fluorescence microscopy workflows where a red-emitting Cy3 reporter is advantageous. Cell biology and molecular imaging groups incorporate the Cy3-labeled nucleotide into DNA products or probes to track nucleic acid distribution, hybridization events, or labeled DNA constructs within experimental samples. The propargylamino functionality also supports workflows where additional click-compatible conjugation is needed to attach nucleic acids to carriers or imaging scaffolds.

5. Solid-Phase DNA Conjugates

5-Propargylamino-dCTP-Cy3 (ethyl) is leveraged to create fluorescent DNA conjugates for surface functionalization and immobilized assay formats. Materials science and chemical biology teams use the Cy3 label to confirm surface-associated DNA and to monitor conjugate formation by fluorescence readout. The alkyne-bearing handle supports coupling to azide-functional surfaces or linkers, enabling fabrication of DNA-functional materials used in binding studies, nucleic acid capture workflows, and fluorescence-based quality control of immobilized probe density.