| Symbol |
Meaning |
| Aad |
2-Aminoadipic acid |
| bAad |
3-Aminoadipic acid |
| bAla |
beta-Alanine, beta-Aminopropionic acid |
| Abu |
2-Aminobutyric acid |
| 4Abu |
4-Aminobutyric acid, piperidinic acid |
| Acp |
6-Aminocaproic acid |
| Ahe |
2-Aminoheptanoic acid |
| Aib |
2-Aminoisobutyric acid |
| bAib |
3-Aminoisobutyric acid |
| Apm |
2-Aminopimelic acid |
| Dbu |
2,4 Diaminobutyric acid |
| Des |
Desmosine |
| Dpm |
2,2’-Diaminopimelic acid |
| Dpr |
2,3-Diaminopropionic acid |
| EtGly |
N-Ethylglycine |
| EtAsn |
N-Ethylasparagine |
| Hyl |
Hydroxylysine |
| aHyl |
allo-Hydroxylysine |
| 3Hyp |
3-Hydroxyproline |
| 4Hyp |
4-Hydroxyproline |
| Ide |
Isodesmosine |
| aIle |
allo-Isoleucine |
| MeGly |
N-Methylglycine, sarcosine |
| MeIle |
N-Methylisoleucine |
| MeLys |
6-N-Methyllysine |
| MeVal |
N-Methylvaline |
| Nva |
Norvaline |
| Nle |
Norleucine |
| Orn |
Ornithine |