sulfo-Cyanine5.5 tyramide

Sulfo-Cyanine5.5 tyramide is a cyanine dye-based tyramide labeling reagent designed for fluorescence localization in fixed cells and tissue sections using tyramide signal amplification workflows. Its sulfonated, water-soluble character supports aqueous staining and conjugation to biomolecules in proximity to an enzyme-generated radical, enabling bright, spatially resolved imaging in microscopy and downstream fluorescence analysis. Emission in the far-red region makes it a common choice when multiplexing with green-to-red channels while retaining strong signal for imaging readouts.

1. Tyramide Signal Amplification Microscopy

Sulfo-Cyanine5.5 tyramide is used in immunofluorescence and other enzyme-linked staining formats where tyramide signal amplification is needed to visualize low-abundance targets with high local signal. Researchers and core microscopy labs typically apply it to fixed samples, including cultured cells, tissue cryosections, and prepared specimen slides, to enhance staining intensity at the site of antigen recognition. The far-red fluorescence output supports sensitive fluorescence microscopy workflows, including confocal imaging and quantitative image analysis, where robust signal localization and reduced background are important for reliable visualization of marker distribution.

2. Immunostaining And Multiplex Panels

Sulfo-Cyanine5.5 tyramide is frequently incorporated into multicolor staining panels for biomarker detection when far-red separation helps reduce spectral overlap with common fluorophores in the blue/green/orange range. Antibody-based workflows using peroxidase-linked detection systems can generate the reactive tyramide species that deposits the cyanine dye onto nearby biomolecular targets, supporting sequential staining strategies used in phenotyping studies and spatial biomarker mapping. Fluorescence imaging teams often select this reagent to extend the usable spectral window of their panel and to maintain strong far-red contrast for marker co-localization studies in complex biological samples.

3. Flow Cytometry Signal Enhancement

Sulfo-Cyanine5.5 tyramide is applied in fluorescence-activated cell sorting workflows when researchers need enhanced labeling intensity from enzyme-mediated tyramide deposition to improve visualization of target-associated signals. In practical lab use, it is incorporated into staining schemes that couple target recognition to an enzyme step, followed by dye deposition that yields a stable fluorescent readout for cell-by-cell analysis. Flow cytometry users value the far-red emission for gating strategies and for expanding multiplex capacity, especially in panels that already occupy lower-wavelength channels with conventional dyes.

4. Tissue Section Fluorescence Mapping

Sulfo-Cyanine5.5 tyramide supports fluorescence mapping of biomolecules in tissue sections where spatial context is critical, such as comparative marker localization across regions of interest. Histology and translational research groups use it to strengthen signal for immunohistochemistry-adjacent fluorescence staining approaches that rely on enzyme-generated tyramide radicals. The sulfonated cyanine dye format supports aqueous staining steps compatible with slide-based workflows, and its far-red emission facilitates imaging with standard fluorescence microscopes and slide scanners for quantitative morphometric analysis of labeled structures.