Examples of data (m/z versus number of accumulated scans (corresponds to LC retention time), 10 seconds each) obtained from HPLC-FT-ICR mass spectrometry of aortic (a) and coronary (b) samples. The light spots in the diagrams correspond to individual mass spectral peaks. In the original diagrams the peak intensities are color coded for easy recognition. (Figure modified from reference [9] with kind permission from the publisher).