FIGURE 1.
Optical properties of FAP-2286-ICG. (A) Absorbance spectra of FAP-2286-ICG and free ICG; (B) Fluorescence emission spectra of FAP-2286-ICG and free ICG; Visual (C) and quantitative (D) results of the relationship between FAP-2286-ICG concentration and relative fluorescence intensity in vitro; (E) Viability of U87MG cells incubated with different concentrations of FAP-2286-ICG for 48 h. Data were expressed as mean ± SD (n = 3).