Figure 4.
Overlay of background subtracted base peak chromatograms (m/z 100–1500) of WBE (2 mg/ml) in HFS (0.1 g/ml in PBS buffer) at t0 (blue) t4 (red) and t24 (green). (a) Chromatogram at retention time 0–20 min; (b) chromatogram at retention time 20–40 min. Peak numbers are as indicated in Table 3. M, matrix peaks (peaks that are also contained in HFS samples without WBE addition).