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. 2018 Nov 21;9:4917. doi: 10.1038/s41467-018-07412-6

Fig. 4.

Fig. 4

Metabolic engineering of vitamin B12 production in E. coli. a Metabolic engineering in E. coli of a de novo vitamin B12 biosynthetic pathway. Five modules are used to synthesize vitamin B12 from glucose in E. coli. b HPLC analysis and c mass spectrometry analysis of vitamin B12 produced by the FH218 strain. d HPLC analysis and e mass spectrometry analysis of vitamin B12 produced by FH219. Adenosylcobalamin was converted to vitamin B12 for detection