Protein families
- Class-I pyridoxal-phosphate-dependent aminotransferase family
- Class-IV pyridoxal-phosphate-dependent aminotransferase family
- Class-V pyridoxal-phosphate-dependent aminotransferase family
- LacI family
- Peptidase S8 family
- PRD-containing transcription factors
- PSMR family
- SEDS proteins
- UPF0750 membrane proteins