Any position
| Allowed Value | Details | 
|---|---|
| Any position | Protein modification can occur in any position of the polypeptide sequence | 
| C-terminal | Protein modification can only occur on C-terminus | 
| N-terminal | Protein modification can only occur on N-terminus | 
| Allowed Value | Details | 
|---|---|
| Any position | Protein modification can occur in any position of the polypeptide sequence | 
| C-terminal | Protein modification can only occur on C-terminus | 
| N-terminal | Protein modification can only occur on N-terminus |