Fig. 2

Effect of CdgL on the production of 4-HBA, 3-HBA, and yellow-pigment in L. enzymogenes. a Quantification of 3-HBA and 4-HBA levels produced in the wild-type OH11 and its derivatives as measured by HPLC. b Effect of exogenous addition of 3-HBA or 4-HBA on the production of yellow pigment of the ΔcdgL or ΔlenB2 strain. c Effect of CdgL on the production of yellow pigment in L. enzymogenes. d Representative results showing the yellow or white phenotype from the test strains. OH11, the wild-type strain; ΔcdgL, the cdgL deletion mutant; ΔcdgL (pBBR) and ΔcdgL (cdgL), the mutant strain carrying an empty vector or a plasmid-borne cdgL; ΔlenB2, the lenB2 deletion mutant. Average data from three experiments are shown, ± SD. **P < 0.01