Fig. 2From: Genetic engineering of the precursor supply pathway for the overproduction of the nC14-surfactin isoform with promising MEOR applicationsHPLC–MS analysis of the isomeric composition of surfactin. a The HPLC profile of surfactin produced by the engineered strains BSFX024 and BSFX025. b The ESI–MS spectrum of surfactin produced by BSFX024. c The ESI–MS spectrum of surfactin produced by BSFX025Back to article page