Genomic organization of the genes of the methionine salvage pathway. The different patterns are represented by one species for each genus with a unique pattern: Ec, Escherichia coli K12 MG1655; Ck, Citrobacter koseri; Eclo Enterobacter cloacae ATCC 13047; Kp, Klebsiella pneumoniae NTUH-K2044; Cs, Cronobacter sakazakii; Pa, Pantoea ananatis; Pa2, Pantoea sp. At-9b; Ea, Erwinia amylovora; Ye, Yersinia enterocolitica; Sp, Serratia proteamaculans; Dd, Dickeya dadantii Ech703; Patr, Pectobacterium atrosepticum; Sg, Sodalis glossinidius; Ps, Pseudoalteromonas sp. SM9913. Genes are color-coded and spaces have been introduced between adjacent genes in order to align homologs vertically. Pseudogenes in S. glossinidius have letters after the locus number. In cases where a large number of other genes intervene between those of interest, a separation symbol is used://. Groups of metboxes are indicated by circled numbers based on which genes they are adjacent to. These are filled in black if there is strong conservation (≥70% identity to a reference species), outlined in black for weaker conservation (≥60% identity), and outlined in gray for more divergent sequences. The reference species were C. koseri for groups 1, 3 and 4; and P. atrosepticum for group 2. Genes which were tested for repression in this paper are displayed with their repression ratio above the gene arrow. In the case of Yersinia, ratios in parentheses refer to Y. pseudotuberculosis.