Aminoallyl-dUTP-Cy5 (ethyl)

Aminoallyl-dUTP-Cy5 (ethyl) is a Cy5-based fluorescent nucleoside analog designed for post-synthetic fluorescence labeling workflows. The aminoallyl functional handle enables covalent coupling of the Cy5 dye to biomolecules during nucleic acid labeling, supporting visualization and quantitative readouts in fluorescence-based assays. Its Cy5 emission profile is commonly leveraged in fluorescence microscopy and nucleic acid analysis where far-red detection reduces background from shorter-wavelength fluorophores.

1. Nucleic Acid Labeling

Aminoallyl-dUTP-Cy5 (ethyl) is used by molecular biology and genomics labs to incorporate fluorescent nucleotides into DNA during labeling reactions, enabling direct visualization of nucleic acid samples without relying on noncovalent dye intercalation. Researchers commonly apply Cy5-labeled DNA or cDNA in hybridization experiments, fluorescence imaging of nucleic acid-containing gels, and quantitative fluorescence readouts in nucleic acid workflows. The aminoallyl functionality supports robust covalent dye attachment strategies used to generate stable fluorescent probes for downstream detection.

2. Fluorescence Hybridization Probes

Aminoallyl-dUTP-Cy5 (ethyl) supports the construction of Cy5-tagged nucleic acid hybridization reagents used to track sequence-specific binding events. In typical research workflows, Cy5-labeled targets or probes are generated for hybridization-based assays where far-red fluorescence provides clear separation from autofluorescence and many common assay backgrounds. This makes the reagent valuable for labs performing fluorescence readouts of nucleic acid interactions, including probe-based detection formats used in molecular diagnostics research and nucleic acid characterization studies.

3. Microarray and Blot Imaging

Aminoallyl-dUTP-Cy5 (ethyl) is frequently incorporated into labeling strategies for imaging nucleic acids on solid supports, including microarrays and blot-based formats used in gene expression and target validation studies. Cy5 fluorescence is well matched to standard far-red imaging systems, allowing researchers to quantify signal across multiple spots or bands using fluorescence scanners and imaging documentation tools. The covalent nature of the labeling approach helps maintain signal stability during washing steps that are typical in hybridization and membrane-based workflows.

4. Fluorescent qPCR Assay Development

Aminoallyl-dUTP-Cy5 (ethyl) is used in assay development contexts where fluorescent nucleotides are incorporated to generate measurable Cy5-associated signal during amplification or nucleic acid synthesis. Research groups developing fluorescence-based nucleic acid assays use Cy5 labeling to monitor nucleic acid production and to build assay formats that benefit from far-red detection. This workflow is particularly relevant when labs want to track nucleic acid incorporation with a stable, covalently associated fluorophore rather than relying solely on dye intercalators.