FIG. 2.

Unrooted neighbor-joining tree of 31 Enterobacteriaceae species (type strains were sequenced) and three other Gammaproteobacteria constructed using the concatenated sequences of four loci (fusA, leuS, pyrG, and rpoB). Sequences of the following strains were retrieved from public databases: Y. pestis CO92 (accession no. NC_003143), P. multocida subsp. multocida Pm70 (NC_002663), S. oneidensis MR-1 (NC_004347), and H. influenzae Rd KW20 (NC_000907). All P. shigelloides strains were placed on the same branch as the type strain. The numbers at the nodes correspond to bootstrap values obtained with 1,000 replicates that were more than 80%.