A 36 kb sequence of the region of the chromosome at around 55° has been determined. The sequenced region contains 36 ORFs including the and genes, and the whole operon. The gene is transcribed in the direction opposite to that of chromosome replication, while most ORFs, including and the operon, are transcribed in the same direction. Two newly identified tRNA genes upstream of the operon were those for Arg-tRNA and Gly-tRNA. The sequenced region contains an operon consisting of genes for degradation and uptake of mannan. The operon and its downstream ORFs are well conserved among sp. and σ consensus sequences are present in the promoter regions of three ORFs, including


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