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iFluor® 594 Tyramide
For many immunohistochemical (IHC) applications, traditional enzymatic amplification procedures are sufficient for achieving adequate antigen detection. However, several factors limit their sensitivity and utility. Tyramide signal amplification (TSA) has proven to be a particularly versatile and powerful enzyme amplification technique with improved assay sensitivity. TSA is based on the ability of HRP, in the presence of low concentrations of hydrogen peroxide, to convert labeled tyramine-containing substrate into an oxidized, highly reactive free radical that can covalently bind to tyrosine residues at or near the HRP. To achieve maximal IHC detection, tyramine is prelabeled with a fluorophore. The signal amplification conferred by the turnover of multiple tyramide substrates per peroxidase label results in the ability to detect low-abundance targets with ultrasensitive precision and reduces the amount of antibodies and hybridization probes needed. In IHC applications, this method can also enhance sensitivity in cases where the primary antibody dilution needs to be increased to reduce nonspecific background signals or overcome weak immunolabeling due to suboptimal fixation procedures or low levels of target expression. The iFluor® 594 tyramide contains the bright iFluor® 594 that can be readily detected with the standard Texas Red filter set, as well as with a TRITC or Cy3 filter set. iFluor® dyes have higher fluorescence intensity, increased photostability, and enhanced water solubility, resulting in fluorescence signals with significantly higher precision and sensitivity. iFluor® 594 is an excellent replacement for Alexa Fluor® 594 tyramide (Alexa Fluor® is the trademark of ThermoFisher) or other comparable fluorescent tyramide conjugates.
Formalin-fixed, paraffin-embedded (FFPE) human lung tissue was labeled with anti-EpCAM mouse mAb followed by HRP-labeled goat anti-mouse IgG (Cat No. 16728). The fluorescence signal was developed using iFluor® 594 tyramide (Cat No. 45107) and detected with a TRITC/Cy3 filter set. Nuclei (blue) were counterstained with DAPI (Cat No. 17507).
Formalin-fixed, paraffin-embedded (FFPE) human lung tissue was labeled with anti-EpCAM mouse mAb followed by HRP-labeled goat anti-mouse IgG (Cat No. 16728). The fluorescence signal was developed using iFluor® 594 tyramide (Cat No. 45107) and detected with a TRITC/Cy3 filter set. Nuclei (blue) were counterstained with DAPI (Cat No. 17507).
protocol
Protocol
sds
SDS
CatalogSize
Price
Quantity
45107200 Slides
Price
 
Physical properties
Molecular weight841.95
SolventDMSO
Spectral properties
Absorbance (nm)587
Correction factor (260 nm)0.05
Correction factor (280 nm)0.04
Extinction coefficient (cm -1 M -1)
200000
1
Excitation (nm)587
Emission (nm)603
Quantum yield
0.53
1
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
UNSPSC12171501
Instrument settings
Fluorescence microscope
ExcitationCy3/TRITC filter set
EmissionCy3/TRITC filter set
Recommended plateBlack wall/clear bottom
Instrument specification(s)Compatible with Texas Red filter set
Documents
Protocol
Safety Data Sheet
Certificate of Analysis
Brochure: Power Styramide™ Signal Amplification (PSA™)
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Page updated on October 30, 2025