Table 2. Fluorogenic properties of FCANB before and after the reaction with PYP proteins.

PYP	None	WT	D53R	D71R	E74R	D97R	4R
Fold activation a (522 nm)	1	14	14	17	15	11	14

^aFold-activation values were calculated based on the peak fluorescence intensities of FCANB at 522 nm.