OXE
PCM
| Residue type | PCM type | Category | Position | UniProt PTM accession | Entries in PDB |
| CYS | None | Crosslinker | Amino-acid side chain (Any position) | 2 | |
| CYS | None | Crosslinker | Amino-acid side chain (Any position) | 2 | |
| DCY | None | Crosslinker | Amino-acid side chain (Any position) | 3 | |
| DCY | None | Crosslinker | Amino-acid side chain (Any position) | 3 | |
| LE1 | None | Crosslinker | Amino-acid side chain (Any position) | 0 | |
| LE1 | None | Crosslinker | Amino-acid side chain (Any position) | 0 |
