Fig. 5From: Characterization and complete genome analysis of the surfactin-producing, plant-protecting bacterium Bacillus velezensis 9D-6MS/MS de novo sequencing identified m/z 1022.6732 (C53H93N7O13) as [Leu7] surfactin C15. Purple arrows show changes in fragment m/z due to loss of the indicated amino acids from the full-length molecule. Red arrows show changes in fragment m/z due to addition of the indicated amino acids, starting from the di-leucine fragment at m/z 227.1751Back to article page