This result is consistent with previous study that the
GlpK-GlpD/GlpABC pathway is the major glycerol utilization pathway while the GldA-DhaLKM pathway exerts negligible impact on
glycerol metabolism in aerobic condition (Kim et al., 2014). Finally,
glycerol production from glucose and xylose was successfully
achieved by expression of both GPD1 and GPP2 in recombinant
E. coli JHS01169 without glycerol reutilization, of which system
was used for further engineering of E. coli.