| Kingdom | Residues | Position | Rule |
| Eukaryotes and Viruses | C | Three residues away from the C-terminus | PDOC00266.
Frequently associated with cleavage of a C-terminal propeptide (CAAX processing) and subsequent methylation of new C-terminus. |
| average | 272.4741 |
| monoisotopic | 272.2504 |