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Genomic organization of ORFs 1–6: ORF1 (algC) encodes a phosphomannomutase, ORF2 a peptidase, ORF3 a tryptophanyl-tRNA synthetase, ORF4 a methionine aminopeptidase, ORF5 an aminotransferase, and ORF6 a periplasmic β-lactamase. The black triangles represent the transposon insertions resulting in the inactivation of the resistance to ampicillin.
