Table 2.

Assignments of iturin and fengycin mass peaks obtained by MALDI-TOF mass spectrometry of chromatographic fraction F4 obtained from the partial purification of biosurfactants produced by Bacillus subtilis TR47II

Mass peak (m/z)	Assignments	References
1043.5	(C14) Iturin A2 [M + H]+	Romero et al. (2007), Pathak and Keharia (2014), Yang et al. (2015)
1057.5	(C15) Iturin A3/A4/A5 [M + H]+	Romero et al. (2007), Pathak and Keharia (2014), Yang et al. (2015)
1071.5	(C16) Iturin A6/A7 [M + H]+	Romero et al. (2007), Pathak and Keharia (2014)
1463.8	(C16) Fengycin [M + H]+, Ala-6	Yang et al. (2015)
1477.8	(C17) Fengycin [M + H]+, Ala-6	Yang et al. (2015)
1495.8	(C17) Fengycin [M + H]+	Yang et al. (2015)
1503.8	(C17) Fengycin [M + Na]+, Val-6	Rautela et al. (2014)