Given the availability of a reasonably complete phylogenetic tree constructed by means of modern nucleic acid sequencing techniques, it is sometimes possible to use biochemical-pathway characteristics as a basis to fine-tune the phylogenetic position of certain organisms making up the tree. A case in point in Serpens flexibilis, a helical bacterium shown by oligonucleotide cataloging to belong to the group Ia cluster of pseudomonads. The results show that within the group Ia pseudomonad cluster, S. flexibilis clusters with the Pseudomonas stutzeri/P. mendocina/P. alcaligenes/P. pseudoalcaligenes assemblage, which diverges from a lineage leading to P. aeruginosa and from yet another lineage leading to species of Azomonas and Azotobacter.
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Ahmad, S., Jensen, R.A. Evolution of the biochemical pathway for aromatic amino acid biosynthesis in Serpens flexibilis in relationship to its phylogenetic position. Arch. Microbiol. 147, 8–12 (1987). https://doi.org/10.1007/BF00492897
- Biochemical evolution
- Aromatic biosynthesis
- Regulatory enzymes