Aminoallyl-dUTP-Texas Red

Aminoallyl-dUTP-Texas Red is a modified nucleoside triphosphate bearing an aminoallyl handle and the Texas Red fluorophore for post-labeling conjugation workflows. This reagent is commonly used to incorporate Texas Red into nucleic acids during enzymatic polymerization, then attach amine-reactive tags or affinity groups through the aminoallyl functionality. The result is a fluorescently labeled DNA or RNA probe or internal standard compatible with fluorescence imaging and nucleic-acid readouts.

1. Fluorescent Nucleic Acid Labeling

Aminoallyl-dUTP-Texas Red is used by molecular biology and nucleic-acid assay developers to generate Texas Red-labeled DNA or RNA for fluorescence-based detection. Researchers typically incorporate the modified dUTP into templates using polymerases, then use the aminoallyl group for downstream conjugation to introduce additional reporters, capture handles, or signal-modulating moieties without changing the underlying nucleic-acid sequence. This approach is widely adopted in probe preparation for hybridization workflows and fluorescence microscopy of nucleic-acid localization, where a stable, red-emitting dye is advantageous for multiplex panel design.

2. Post-Labeling Probe Conjugation

Aminoallyl-dUTP-Texas Red supports modular probe construction by enabling post-synthesis attachment of functional groups to the aminoallyl handle. In practice, assay teams use the incorporated Texas Red nucleotides as a scaffold to couple amine-reactive chemistries (for example, to add biotin, linkers, or secondary fluorescent reporters) to create customized hybridization probes, standards, or imaging reagents. This flexibility is particularly valuable when probe performance depends on adding a specific conjugation functionality while maintaining a consistent Texas Red fluorescence readout for assay normalization and traceability.

3. Fluorescence In Situ Hybridization

Aminoallyl-dUTP-Texas Red is frequently employed in fluorescence in situ hybridization workflows where red fluorescence labeling of nucleic acids is required for cellular or subcellular visualization. Laboratories use the aminoallyl-enabled Texas Red nucleotides to prepare probes that can be hybridized to fixed samples, enabling researchers to track target sequences with a dye that performs well in standard fluorescence microscopy filter sets. The aminoallyl handle also provides a route for introducing additional conjugation features when probe immobilization or signal amplification strategies are part of the experimental design.

4. qPCR and Nucleic Acid Assay Development

Aminoallyl-dUTP-Texas Red is used in fluorescence assay development contexts that require a nucleic-acid-associated Texas Red signal for monitoring or quantification. Researchers incorporate the modified nucleotide into nucleic-acid constructs or standards to create fluorescently tracked templates and calibration materials for method optimization, workflow validation, and assay controls. The aminoallyl functionality further allows downstream conjugation to tailor assay format components, such as immobilization supports or secondary detection reagents, while keeping Texas Red as the primary fluorescence reporter for readout.