Differential metabolic gene clusters in the genomes of <i>E</i>. <i>coli</i> BL21(DE3) and <i>E</i>. <i>coli</i> K-12 MG1655.

Presence of gene clusters for O7 antigen biosynthesis (A), capsular gene cluster (B), D-arabinose metabolism (C), N-acetylgalactosamine metabolism (D), and 3- or 4- hydroxyphenylacetate metabolism (E). Absence of gene clusters for phenyl acetic acid utilization (F). Prophage DE3 insertion and lack of gene clusters for galactose metabolism and molybdate ABC transporters (G). Gene names in red are for BL21(DE3) genes, the reactions of which were included in the BL21(DE3) metabolic model.