TurboFP635 (scientific name Katushka) is a far-red mutant of the red fluorescent protein from sea anemone Entacmaea quadricolor [Shcherbo et al., 2007]. Possessing excitation/emission maxima at 588/635 nm, TurboFP635 is 7 to 10-fold brighter compared to the spectrally close HcRed [Gurskaya et al., 2001] or mPlum [Wang et al., 2004]. TurboFP635 is characterized by fast maturation and a high pH-stability and photostability. The unique characteristics of TurboFP635 make it the protein of choice for visualization within living tissues and dual-color high-throughput assays.

TurboFP635 is mainly intended for applications where fast appearance of far-red fluorescence is crucial. It is specially recommended for multicolor imaging, tracking the promoter activity in auto-fluorescent tissues, cell and organelle labeling.