CFP™ Fluorophores
The Cleavable TSA Fluorophores
How does the cleavable TSA fluorophore work?

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

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


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.