Four mesorhizobial genomes plotted against the 7653R genome using PROmer (PROtein MUMmer). A sequence aligned according to the MAFF303099 replication origin and reverse-complement sequences of WSM2073, WSM1271, and WSM2075 were used. Line figures depict the results of PROmer analysis. Red dots represent similar sequences in the forward direction in each genome pair, whereas blue dots indicate that the similarity is in the opposite orientation. Green arrows show the location of fragments missing on the 7653R chromosome.