Figure 5.
Identification of MaR1 in human synovial fluid, upper left corner selected reaction monitoring chromatograms of the transition m/z 359→221, black – unspiked sample, red - co-injection of a synthetic MaR1 standard (100 pg on column spike level), upper right corner – MS/MS spectrum of MaR1, lower right corner - MS3 spectrum of the characteristic MaR1 fragment m/z 221 corresponding to the sample, lower left corner MS3 spectrum of synthetic MaR1 (m/z 221) – standard sample (10 pg on column).