Phyletic Distribution of AspRS, AsnRS, GatB, and the GAD Domain
| Species range | AspRS | AsnRS | GatB | ||
| with GAD domain | without GAD domain | with GAD domain | without GAD domain | ||
| Archaea M. jannaschii, M. thermoautorphicum, A. fulgidus | − | + | − | + | + |
| Archaea P. horikoshii | − | + | + | + | − |
| Bacteria Proteobacteria, Cyanobacteria, Spirochetes, Grampositive bacteria | + | − | + | − | + |
| Bacteria Mycobacteria, Helicobacter, Chlamydia, Aquifex | + | − | − | − | + |