Aminoallyl-dUTP-Cy3 (ethyl)

Aminoallyl-dUTP-Cy3 (ethyl) is a Cy3-based fluorescent nucleoside analog designed for post-incorporation labeling of nucleic acids. Incorporation of the modified dUTP into DNA or RNA provides a handle for subsequent dye conjugation, enabling fluorescent tracking of hybridization probes, sequencing-related workflows, and labeled nucleic acid standards. The Cy3 fluorophore supports bright red-orange emission commonly used in fluorescence microscopy and fluorescence detection platforms.

1. Fluorescent Nucleic Acid Labeling

Aminoallyl-dUTP-Cy3 (ethyl) is used by molecular biology and genomics labs to generate fluorescently tagged DNA or RNA for downstream hybridization and imaging workflows. Researchers incorporate the aminoallyl-functionalized nucleotide into target strands during nucleic acid synthesis, then use the amino-reactive labeling step to install or enhance Cy3 fluorescence on the resulting oligonucleotide or probe material. This approach is frequently applied when fluorescent labeling needs to be introduced after probe construction, such as for custom hybridization probes and labeled nucleic acid fragments used in screening or visualization.

2. Hybridization Probe Development

Aminoallyl-dUTP-Cy3 (ethyl) supports the preparation of Cy3-labeled nucleic acid probes for fluorescence-based hybridization assays. Molecular diagnostics research groups and academic labs use Cy3-labeled oligonucleotides to visualize binding to complementary sequences in blot-style assays and fluorescence readouts where red-emitting probes are compatible with standard optical filters. By generating fluorescent probes from sequence-defined nucleic acids, users can streamline probe generation for target-specific experiments, including assay development for nucleic acid analysis workflows that rely on fluorescence detection rather than enzymatic reporters.

3. Fluorescence Microscopy Imaging

Aminoallyl-dUTP-Cy3 (ethyl) is applied in fluorescence microscopy workflows that require fluorescent nucleic acid visualization. Cell biology and imaging groups use Cy3-labeled nucleic acids to track hybridization events or to visualize nucleic acid localization in fixed sample formats, leveraging the strong Cy3 signal for microscopy readout. The aminoallyl-Cy3 labeling strategy is particularly useful when researchers need to prepare fluorescent probes that are compatible with imaging experiments and can be tuned by probe design and labeling density.

4. Fluorescence-Based Nucleic Acid Assays

Aminoallyl-dUTP-Cy3 (ethyl) is also used in fluorescence detection formats for nucleic acid quantification and assay development where a Cy3 reporter is read on fluorescence instruments. Assay developers incorporate the modified nucleotide into assay components or standards to create fluorescent nucleic acid reagents that can be monitored by plate readers or other fluorescence measurement systems. This enables workflow-friendly generation of labeled nucleic acid materials for method development, calibration, and comparative studies in fluorescence-based nucleic acid analysis.