| FAN | Free amino nitrogen |
| HPLC | High-performance liquid chromatography |
| FLD | Fluorescence detector |
| OPA | o-Phthalaldehyde |
| Ala | Alanine |
| Arg | Arginine |
| Asn | Asparagine |
| Asp | Aspartate |
| Cys | Cysteine |
| Glu | Glutamate |
| Gln | Glutamine |
| Gly | Glycine |
| His | Histidine |
| Ile | Isoleucine |
| Leu | Leucine |
| Lys | Lysine |
| Met | Methionine |
| Phe | Phenylalanine |
| Pro | Proline |
| Ser | Serine |
| Thr | Threonine |
| Trp | Tryptophan |
| Tyr | Tyrosine |
| Val | Valine |