Rhodamine-12-dUTP

Rhodamine-12-dUTP is a fluorescent nucleoside analog designed for DNA incorporation, providing a rhodamine-based labeling handle for fluorescence microscopy and nucleic acid analysis workflows. As a dUTP derivative, it is commonly used to introduce fluorescent signals into DNA templates during enzymatic synthesis, enabling visualization and quantification of nucleic acid localization, hybridization, or amplification readouts. The rhodamine emission is well matched to standard visible-light fluorescence detection systems used in molecular biology and imaging labs.

1. Fluorescent DNA Labeling

Rhodamine-12-dUTP is frequently used by molecular biology and genomics laboratories to generate fluorescently labeled DNA probes and templates for downstream fluorescence imaging and analysis. Researchers incorporate this dUTP analog into DNA using polymerase-based nucleic acid synthesis steps, producing DNA materials that can be hybridized to complementary strands or used as fluorescent reporters in binding studies. The rhodamine fluorophore provides a strong, readily imaged signal for tracking nucleic acid distribution in gel-based workflows, microscopy, and other fluorescence readouts where DNA is the primary analyte.

2. Fluorescence In Situ Hybridization

Rhodamine-12-dUTP supports fluorescence-based nucleic acid staining approaches where labeled DNA is used to localize specific sequences in fixed biological samples. In fluorescence microscopy workflows, users prepare rhodamine-labeled DNA probes from this reagent and apply them to hybridization assays to visualize target nucleic acid regions within cells or tissue sections. This application is particularly useful for researchers performing sequence localization studies, validating probe performance, and comparing hybridization patterns across experimental conditions using standard rhodamine-compatible filter sets.

3. qPCR and Amplification-Based Imaging

Rhodamine-12-dUTP is also used in fluorescence amplification workflows where incorporation of a fluorescent nucleotide analog allows monitoring of nucleic acid synthesis by fluorescence readout. Many assay developers and molecular assay teams use rhodamine-labeled amplification products as fluorescent markers for endpoint or imaging-based nucleic acid analysis, including workflows that rely on visualizing amplified DNA rather than relying exclusively on sequence-specific labeled primers. This reagent is therefore relevant to laboratories building fluorescence readouts for nucleic acid quantification, sample tracking, and assay development where the fluorescent label is introduced through DNA synthesis.

4. Fluorescent Probe Construction

Rhodamine-12-dUTP is commonly used to construct fluorescent DNA probes for hybridization and molecular detection experiments in research settings. Probe developers incorporate the reagent into DNA to generate labeled strands that can be used to interrogate complementary targets, including in nucleic acid binding assays, workflow optimization studies, and fluorescence-based characterization of probe behavior. By providing a covalently attached rhodamine label within the DNA backbone, this reagent enables consistent probe labeling for experiments requiring stable fluorescence associated with the nucleic acid rather than dye adsorption.