CFP™ Fluorophores

The Cleavable TSA Fluorophores

How does the cleavable TSA fluorophore work?

CFP Fluor: The cleavable TSA fluorophores

Similar to tyramide signal amplification (TSA), CFP Fluor cleavable TSA fluorophores leverage the catalytic activity of horseradish peroxidase (HRP) to enable the covalent deposition and binding of labeled fluorophores onto target proteins or nucleic acid sequences in situ. Our fluorophores are engineered for much higher reactivity than tyramide fluorophores, making the imaging process significantly faster and more robust than conventional TSA-based applications. Unlike conventional TSA fluorophores, CFP Fluor signals can be cleaved using mild cleavage reagents, enabling ultra-senstivie reiterative staining with standard antibodies. Furthermore, CFP Fluor technology is highly versatile and can be seamlessly integrated into protocols requiring HRP-based detection, including immunohistochemistry (IHC), immunocytochemistry (ICC), immunofluorescence (IF), in situ hybridization (ISH), and proximity ligation assays (PLA).

Choices of CFP Fluorophores

CFP Fluor Excitation and Emission Spectrum
CFP Fluor excitation and emission spectra

Key Features of CFP Fluor:

  • Ultra-sensitive detection of low-abundance targets
  • Conserve precious antibodies. CFP Fluor achieves equivalent levels of sensitivity with a significant reduction in primary antibody
  • Compatible with other fluorescent markers, detection techniques making it suitable for co-detection applications
  • The cleavable fluorophores unlock the capability of cyclic staining for high-multiplex multiomics spatial applications
CFP Fluor Excitation (peak nm) Emission (peak nm)
CFP Fluor 440 434 480
CFP Fluor 488 491 516
CFP Fluor 546 541 557
CFP Fluor 555 557 570
CFP Fluor 594 587 603
CFP Fluor 647 656 670
CFP Fluor 680 684 701
CFP Fluor 750 757 779

Multiplex applications

Human FFPE Tonsil 6 color
A.
B.

10-Plex FFPE Human normal tonsil section stained with CFP Fluor fluorophores. Panel A. Staining round 1 of 5 protein markers. After round 1 imaging was completed, all CFP Fluor signals were cleaved. Staining round 2 was then performed. Panel B. Staining round 2 of another 5 protein markers. CFP Fluor 440, 488, 555, 647 and 750 were used in this study.

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