Aminoallyl-dUTP-ATTO-425

Aminoallyl-dUTP-ATTO-425 is an aminoallyl-modified thymidine analog bearing an ATTO 425 fluorophore, designed for post-incorporation conjugation workflows in nucleic acid labeling. The aminoallyl handle enables efficient attachment of amines-reactive partners after incorporation into DNA, while the ATTO 425 dye provides bright, blue-excited fluorescence for microscopy and fluorescence-based nucleic acid assays. This reagent is frequently used by molecular biology and chemical biology teams to generate fluorescent DNA probes, quantify nucleic acid incorporation, and build labeled templates for downstream imaging and detection.

1. DNA Probe Labeling

Aminoallyl-dUTP-ATTO-425 is used to prepare fluorescent DNA probes for hybridization-based detection workflows, where researchers incorporate the dye-labeled nucleotide into oligonucleotides or DNA templates and then use the resulting labeled strands in fluorescence readouts. Molecular biology groups use it for probe generation in nucleic acid hybridization experiments, including assay development for target-dependent fluorescence measurements and imaging-based localization of nucleic acids. The ATTO 425 emission supports common blue-channel fluorescence detection, and the aminoallyl functionality supports flexible downstream conjugation strategies when additional labeling or coupling is required for specialized probe formats.

2. Nick Translation Labeling

Aminoallyl-dUTP-ATTO-425 is commonly employed in nick translation and related DNA labeling protocols to introduce fluorescent nucleotides into DNA with controllable incorporation patterns for downstream hybridization or imaging. Research teams use the resulting fluorescent DNA as a tracer to visualize nucleic acid distribution in fixed samples, to monitor hybridization efficiency in assay development, or to generate labeled DNA standards for fluorescence quantification workflows. The ATTO 425 fluorophore enables consistent fluorescence readout on standard fluorescence microscopes and plate readers, while the aminoallyl modification provides an additional chemical handle for further derivatization when probe architecture needs to be tailored.

3. Fluorescent Nucleic Acid Conjugates

Aminoallyl-dUTP-ATTO-425 supports the construction of multifunctional nucleic acid conjugates by leveraging the aminoallyl group for coupling to amine-reactive dyes, affinity tags, or surface chemistries after nucleotide incorporation. Chemical biology and materials research groups use these conjugates to create labeled DNA reagents for imaging studies, to functionalize DNA-containing assemblies for assay platforms, or to build probe constructs that require orthogonal labeling beyond the ATTO 425 fluorophore. This approach is particularly useful when researchers want to combine a fluorescent nucleic acid reporter with an additional reactive handle for attaching to carriers, beads, or biomaterial surfaces used in fluorescence-based detection workflows.