| Status | Description | Organism | Genes | References |
|---|---|---|---|---|
| tryptophanase | Aromatoleum aromaticum | tnaA | ||
| tryptophanase | Austwickia chelonae | tnaA | ||
| tryptophanase | Austwickia chelonae | tnaA | ||
| tryptophanase | Alicycliphilus denitrificans | GHU6-1297 | ||
| tryptophanase | Rhodoferax ferrireducens | tnaA | ||
| tryptophanase | Alistipes finegoldii | GL7P-857 | ||
| tryptophanase | Aeromonas hydrophila | tnaA | ||
| tryptophanase/L-cysteine desulfhydrase, PLP-dependent | Acetonema longum | tnaA | ||
| tryptophanase | Alkaliphilus metalliredigens | tnaA | ||
| putative tryptophanase | Actinoplanes missouriensis | GL7J-2296 |