Figure 4. Scatter plot of the ST59 and non-ST59 isolates.
The peaks at m/z 2,416 and m/z 2,980 served as the x- and y-axes, respectively. The intensities of the characteristic peaks were expressed in arbitrary intensity units. The ellipses represent 95% confidence intervals of the peak intensities for ST59 (red ellipse) or non-ST59 (green ellipse). ST59: red crosses, non-ST59: green circles.
