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The prsD, prsE and orf3 genes of Rhizobium leguminosarum bv. trifolii strain TA1 encode the proteins which are significantly related to the family of bacterial ABC transporters type I secretion systems. The prsD:Kmr mutant of strain TA1 induced non-nitrogen-fixing nodules on Trifolium pratense. Microscopic analysis of the nodules induced by prsD mutant did not reveal major abberations in the bacteroid...
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