FDA
PCM
| Residue type | PCM type | Category | Position | UniProt PTM accession | Entries in PDB |
| CYS | None | Covalent chemical modification | Amino-acid side chain (Any position) | 1 | |
| HIS | None | Covalent chemical modification | Amino-acid side chain (Any position) | 1 | |
| HIS | None | Covalent chemical modification | Amino-acid side chain (Any position) | 39 | |
| LYX | None | Covalent chemical modification | Amino-acid side chain (Any position) | 0 |
