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. 2017 Dec 21;12(12):e0188179. doi: 10.1371/journal.pone.0188179

Table 2. Cyclic lipopeptide products of the wild-type B. subtilis subsp. krictiensis ATCC55079 strain as detected by LC-MSa.

Product and observed mass peaks (m/z) Retention time (min) Assignment
Iturin 1043.5, 1041.5 22.61 C14- Iturin A [M + H]+, [M - H]-
1057.5, 1055.4 24.14 C15- Iturin B [M + H]+, [M - H]-
1057.5, 1055.5 26.15 C15- Iturin C [M + H]+, [M - H]-
1071.5, 1069.5 26.44 C16- Iturin D [M + H]+, [M - H]-
1071.5, 1069.5 27.20 C16- Iturin E [M + H]+, [M - H]-
1085.5, 1083.5 28.07 C17- Iturin F [M + H]+, [M - H]-
Surfactin 1008.5, 1006.6 66.05 C13- surfactin [M + H]+, [M - H]-
1022.5, 1020.7 70.88 C14- surfactin [M + H]+, [M - H]-
1022.5, 1020.7 71.93 C14- surfactin [M + H]+, [M - H]-
1036.5, 1034.5 75.23 C15- surfactin [M + H]+, [M - H]-

aThe data were obtained from the supernatant of cells grown in production medium as described in the Materials and Methods. The HPLC peaks presented in S3–S8 and S9 Figs were analyzed by MS spectrometry.