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Far-red fluorescent protein Katushka2S

- Super bright far-red fluorescence
- High signal-to-noise ratio, fast maturation
- Recommended for whole body imaging

Main properties

Katushka2S spectra

Katushka2S normalized excitation (thin line) and emission (thick line) spectra.

Spectra viewer tool
Download Katushka2S spectra (xls)

* Brightness is a product of extinction coefficient and quantum yield, divided by 1000.
Molecular weight, kDa26
Polypeptide length, aa235
Fluorescence colorfar-red
Excitation maximum, nm588
Emission maximum, nm633
Quantum yield0.44
Extinction coefficient, M-1cm-167 000
Brightness, % of EGFP89
Maturation rate at 37°Csuper fast
Photostability,widefield (sec)72
Cell toxicitynot observed
Main advantagessuper bright and fast-maturing far-red fluorescent protein; high pH-stability
Possible limitationsdimer, limited applicability for fusions generation, medium photostability
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