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Rhizobium sp. strain TAL1145 can catabolize mimosine, a toxic amino acid produced by the tree-legume leucaena. The mid and pyd genes involved in mimosine degradation in TAL1145 are located in two clusters within a 25-kb region in the chromosome, which was cloned in plasmid pUHR263. A 5.5-kb EcoRI fragment, located between the mid and pyd genes in pUHR263, was characterized by sequencing and transposon-insertion...