Fig. 2
Production of FABCEs and branched-chain alcohols in engineered E. coli strains. The GC-MS quantification results showed the FABCE composition of engineered E. coli strains. Methyl pentadecanoic acid was used as the internal standard. Each FABCE was confirmed by corresponding standards that were synthesized by esterification of authentic fatty acid standards and alcohols (Additional file 2). All experiments were performed in triplicate and SD (standard deviation) is indicated. Each color indicates one particular product. a Titer of fatty acid esters and branched-chain alcohols in engineered E. coli strains. b Concentration of fatty acid esters and branched-chain alcohols in engineered E. coli strains when the cell mass was counted by OD600 with a coefficient of 0.3 gDCW/OD600