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Characterization of sra32. A. Distance tree of sra32 using the distance/NJ method (clustalW [90]). Numbers at the nodes represent bootstrap proportions (BP) of 1000 replicates. B. In northern blots, a signal for the predicted sra32 was detected corresponding to lengths of 144 and 106 nucleotides in total RNA from S. meliloti 1021 and to 140 and 132 nt in that from Agrobacterium tumefaciens and Rhizobium etli, respectively.
