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. 2023 Nov 3;11:1291824. doi: 10.3389/fbioe.2023.1291824

FIGURE 1.

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).