Fig. 3. (A) MS spectra of a certain amount of cells (5 × 105 cells per mL) under different drug stimulations. (B) Correlation between relative intensity and cell concentration. (C) LDI-TOF MS spectra obtained from the analysis of cell precipitation at different concentrations: (a) 6 × 104 cells per mL, (b) 2 × 104 cells per mL, (c) 1 × 104 cells per mL, (d) 2 × 103 cells per mL and (e) no cells (control experiment). 100 μL cell suspensions were added in the experiment. The peak in blue color refers to the internal standard Au-MT2, and the peak in yellow color refers to LCMP1.
