Fig. 6From: Improving the N-terminal diversity of sansanmycin through mutasynthesisThe production of novel sansanmycin analogues. a The structures of novel compounds produced by ssaX deletion mutant SS/XKO fed with halogenated Phe. The final concentration of each exogenous substrate was 3 mM. The blue labeled parts represent the halogenated Phe incorporated into N- and/or C-terminus. b The relative production level of novel sansanmycin derivatives 1–4 in different strains. Chloramphenicol was added to the cultures as an extra standardBack to article page