Mesenchymal Stem Cells Loaded with p5, Derived from CDK5 Activator p35, Inhibit Calcium-Induced CDK5 Activation in Endothelial Cells

Figure 2

LC/MS with Q-TOF analysis of p5. (a) The total ion chromatogram (TIC) of 200 ng/mL p5. (b) Positive ESI mass spectra (1046.1700  corresponding to [M]³⁺ in excellent agreement with the expected value) of minutes of 200 ng/mL p5. The area of peak was circled. The average peak area for 200 ng/mL p5 from 6 tests was 5563.63 counts. (c) Positive ESI mass spectra (1046.1700 ) of minutes of 100 ng/mL p5. The area of peak was circled. The average peak area for 100 ng/mL p5 from 6 tests was 2430.55 counts. The ESI-MS spectra showed no peak for 50 ng/mL p5 (data not shown).

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