FMN
PCM
| Residue type | PCM type | Category | Position | UniProt PTM accession | Entries in PDB |
| SER | None | Flavin | Amino-acid side chain (Any position) | PTM-0125 | 0 |
| THR | None | Flavin | Amino-acid side chain (Any position) | PTM-0126 | 66 |
| CYS | None | Flavin | Amino-acid side chain (Any position) | PTM-0270 | 43 |
| CYS | None | Flavin | Amino-acid side chain (Any position) | PTM-0271 | 6 |
| HIS | None | Flavin | Amino-acid side chain (Any position) | PTM-0289 | 2 |
| ARG | None | Flavin | Amino-acid side chain (Any position) | 1 | |
| CYS | None | Flavin | Amino-acid side chain (Any position) | 4 |
