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(A) Linear restriction map of the ris locus present in B. bronchiseptica BB7866. The insertion site of mini-Tn5Km2 in risA is indicated. (B) Nucleotide sequence and predicted translation products of the ris locus. The transcriptional start site identified by RACE analysis (+1), the putative promoter consensus sequences (underlined), the position of the transposon insertion (arrowhead), and the stop codons are indicated.
