Figure 2. Spectrum of Mycobacterium abscessus subsp. abscessus and M. abscessus subsp. massiliense created by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry Biotyper system (Microflex LT; Bruker Daltonik GmbH, Bremen, Germany). The absolute intensities of the ions are shown on the y-axis, and the masses (m/z) of the ions are shown on the x-axis. The m/z values represent the mass-to-charge ratio.