Figure 5. The time course of membrane permeation of double fluorescent probes in absence (black line) and presence (red line) of EDTA treatment (0.5 mmol/L).

A and B are the permeability of Eu-DTPA (A) and AuNC@BSA (B) in the Eu-DTPA (20 μmol/L)−AuNC@BSA (1 mg/mL) probe system, respectively; C and D are the permeability of Eu-DTPA (C) and AuNC@GSH (D) in the Eu-DTPA (20 μmol/L)−AuNC@GSH (0.8 mg/mL) probe system, respectively. Data were the mean ± SD of three replicates.