MALDI-TOF MS protein mass fingerprints of Acidovorax oryzae and Acidovorax citrulli. Similar and different marker masses for the identification of A. oryzae and A. citrulli are listed in Table 2. Intensity of ions is shown on the y axis and the mass (in Daltons) of the ions is shown on the x axis. The m/z values represent mass-to charge ratios. *: Unique peaks positions for each of species.