Figure 1.

The distribution of glnA sequences within the genomes of different actinobacterial species reflects the evolutionary history of the phylum Actinobacteria as derived from 16S rRNA phylogenetic analyses and indicates that the glnA3 and glnA4 sequences were acquired in a serial fashion. *(The glnA3 and glnA4 sequences are present as pseudogenes in the genomes of M. leprae and M. ulcerans.)

Hayward et al. BMC Evolutionary Biology 2009 9:48   doi:10.1186/1471-2148-9-48
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