Protein families
- Amino acid-polyamine-organocation (APC) superfamily
- Class-I pyridoxal-phosphate-dependent aminotransferase family
- Class-IV pyridoxal-phosphate-dependent aminotransferase family
- Class-V pyridoxal-phosphate-dependent aminotransferase family
- Dicarboxylate/amino acid:cation symporter (DAACS) (TC 2.A.23) family
- LacI family
- Peptidase S8 family
- PRD-containing transcription factors
- PSMR family
- S-transferase-like (STL) superfamily
- SEDS proteins
- UPF0750 membrane proteins
