Fig. 7

Full ESI–MS scan of LC separated peak from dual gradient fraction (F5 80% acetone pH8) in positive ion mode showing molecular ion [M + H] of peaks at range of 62 to 64 min a C12-Surfactin b C14-Surfactin c C15-Surfactin
Full ESI–MS scan of LC separated peak from dual gradient fraction (F5 80% acetone pH8) in positive ion mode showing molecular ion [M + H] of peaks at range of 62 to 64 min a C12-Surfactin b C14-Surfactin c C15-Surfactin