Aminoallyl-dUTP-ATTO-643

Aminoallyl-dUTP-ATTO-643 is an ATTO 643-labeled nucleoside building block designed for fluorescent incorporation into nucleic acids. The aminoallyl functionality enables post-incorporation conjugation to amines and related coupling handles, supporting flexible fluorescent labeling strategies. Researchers use this reagent to generate bright red fluorescence for microscopy and flow-based nucleic acid readouts, where the dye's photophysical properties support sensitive visualization of labeled DNA probes and amplified targets.

1. Fluorescent Nucleic Acid Labeling

Aminoallyl-dUTP-ATTO-643 is used by molecular biology and genomics laboratories to introduce ATTO 643 fluorescence into DNA during nick translation, random priming, or other polymerase-based incorporation workflows. The aminoallyl-dUTP format supports downstream coupling to additional biomolecules or linkers when a modular labeling scheme is desired, enabling probe construction for hybridization assays and fluorescence imaging of nucleic acid targets. This reagent is particularly valuable when a red-emitting fluorophore is preferred for multiplexing or for reducing spectral overlap with common green-channel dyes.

2. Fluorescence In Situ Hybridization Probes

Aminoallyl-dUTP-ATTO-643 is commonly employed to prepare fluorescent DNA probes for fluorescence microscopy applications such as FISH, where labeled nucleic acids are hybridized to fixed samples to visualize genomic regions or transcript-associated sequences. The ATTO 643 label provides strong signal for detecting hybridization patterns in microscopy workflows, while the aminoallyl handle supports flexible probe refinement for different probe formats and labeling densities. Laboratories developing imaging-based nucleic acid assays use this reagent to generate consistent fluorescent probe material for slide-based studies and quantitative imaging readouts.

3. Flow Cytometry DNA Analysis

Aminoallyl-dUTP-ATTO-643 supports flow cytometry workflows that require fluorescently labeled nucleic acids, including labeling strategies for DNA-containing samples and fluorescence-based readouts of nucleic acid content or incorporation. Researchers use the ATTO 643 signal to track labeled DNA populations and to separate nucleic acid-associated fluorescence from background in multi-color cytometry panels. The aminoallyl-enabled labeling flexibility also helps teams tailor probe conjugation or secondary labeling steps when designing assay reagents for instrument-specific detection schemes.

4. Custom Fluorescent Probe Conjugates

Aminoallyl-dUTP-ATTO-643 is frequently selected for building custom fluorescent nucleic acid conjugates where additional functional groups are needed beyond a simple dye tag. After incorporation, the aminoallyl functionality can be leveraged to attach linkers or biomolecular moieties that improve handling, immobilization, or assay integration into probe platforms. This approach is used in chemical biology and assay development groups that assemble nucleic acid reagents for imaging, hybridization-based detection, or platform-specific labeling workflows requiring a defined fluorescent handle.