FAD
PCM
| Residue type | PCM type | Category | Position | UniProt PTM accession | Entries in PDB |
| TYR | None | Flavin | Amino-acid side chain (Any position) | PTM-0231 | 8 |
| HIS | None | Flavin | Amino-acid side chain (Any position) | PTM-0258 | 150 |
| CYS | None | Flavin | Amino-acid side chain (Any position) | PTM-0272 | 205 |
| HIS | None | Flavin | Amino-acid side chain (Any position) | PTM-0288 | 242 |
| MET | None | Flavin | Amino-acid side chain (Any position) | 1 | |
| ARG | None | Flavin | Amino-acid side chain (Any position) | 1 | |
| ASP | None | Flavin | Amino-acid side chain (Any position) | 1 | |
| CYS | None | Flavin | Amino-acid side chain (Any position) | 7 | |
| CYS | None | Flavin | Amino-acid side chain (Any position) | 80 | |
| GLN | None | Flavin | Amino-acid side chain (Any position) | 1 | |
| LYX | None | Flavin | Amino-acid side chain (Any position) | 0 |
