Figure 1. Optical characterization of TPEARG. (A) Structure and
identification mechanism of TPEARG. The fluorescence intensity of TPEARG
enhanced with the increasing of the solution (B) polarity and (C)
viscosity. (D) When interacted with arginase, the TPEARG emitted
fluorescence and the intensity increased with the concentrations of
arginase. (E) Linearship between the fluorescence intensity of TPEARG
and concentrations of arginase. (F, G) Selectivity of TPEARG to several
interferential factors. 1 μM TPEARG was introduced in these experiments.
λex= 390 nm. The data are expressed as mean ± SD.