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TA loci features in individual replicons of S. meliloti strain 1021. (a) Repartition of TA loci in the chromosome (new and confirming Pandey et al.'s [39] findings) and in the two megaplasmids. (b) Percentage of TA loci as a function of replicon size. (c) Repartition with respect to leading and lagging strands of replication. (d) Frequency of the three genomic organizations found for TA genes in the three replicons.
