Figure 1.

ompF gene locus in Escherichia coli CFT073, Shigella flexneri 2a str. 2457T, Salmonella typhimurium LT2, and in the Photorhabdus luminescens subsp. laumondii TTO1 locus with annotation as ompN. In the S. typhimurium locus, genes pncB and pepN (not shown) are present however there are three genes inserted between pncB and asnS. The unmarked blue gene in E. coli is a hypothetical protein 61 amino acids long. The unmarked pink gene in S. typhimurium is a partially characterized protein and assumed to be a putative leucine response regulator. Gene arrangements are as shown on the NCBI website [16].