ATTO Rho13 Biotin

ATTO Rho13 Biotin is a biotinylated ATTO Rho13 fluorescent dye designed for fluorescence labeling workflows that require strong, widely used biotin-avidin/streptavidin coupling. Its rhodamine-type emission supports bright fluorescence readouts in microscopy and plate-based assays, while the biotin handle enables convenient conjugation to avidin/streptavidin-coated surfaces, beads, and detection reagents. Researchers use this reagent to build biotin-tagged fluorescent conjugates for biomolecule tracking, reagent immobilization, and fluorescence-based binding assays.

1. Streptavidin Bead Labeling

ATTO Rho13 Biotin is frequently used to fluorescently tag biomolecular complexes and detection reagents through avidin/streptavidin interactions. In bead-based workflows, the biotin moiety provides a practical coupling strategy to immobilize the dye on streptavidin-coated magnetic beads or microbeads, enabling downstream washing steps and robust imaging or plate-reader quantification. This format is commonly adopted in assay development and workflow optimization where stable surface presentation of the fluorophore is required.

2. Fluorescence Microscopy Tracing

ATTO Rho13 Biotin supports fluorescence microscopy experiments that rely on biotin-mediated attachment to labeled biomolecules or affinity reagents. In cell and biomaterial imaging studies, the dye can be incorporated into biotinylated targeting constructs or used to decorate avidin/streptavidin-functionalized components, allowing visualization of binding, localization, and transport events at the level of fluorescent signal distribution. The rhodamine-type brightness makes it a practical choice for tracking biotin-tagged conjugates under standard fluorescence imaging setups.

3. Biotin-Avidin Binding Assays

ATTO Rho13 Biotin is used as a fluorescent reporter in binding and interaction assays that leverage the biotin-avidin/streptavidin recognition pair. In plate-based formats, the dye provides a convenient readout for monitoring binding to avidin-coated wells, streptavidin surfaces, or avidin-presenting assay reagents, supporting workflow-friendly signal generation after incubation and wash steps. This approach is especially useful when assay design benefits from a standardized affinity interaction and a stable fluorescent tag for comparative studies.

4. Surface Immobilization Probes

ATTO Rho13 Biotin is commonly applied in materials science and chemical biology to create fluorescently addressable surfaces via biotin-avidin/streptavidin coupling. Researchers use the reagent to functionalize streptavidin-coated substrates, enabling fluorescent labeling of patterned surfaces, sensor elements, or microarray features for imaging readouts and qualitative mapping of binding events. The biotin handle provides a straightforward route to immobilize the fluorophore without requiring direct dye attachment chemistry to the underlying surface.