| No. | DFBP ID | AA sequence | Peptide/Function name | Organism/Source | Precursor protein | PubDate |
| 1 | DFBPOPIO0050 | YGGFM | Opioid peptide, Methionine-enkephalin | The pituitary gland of pig | β-Lipotropin | 1975 |
| 2 | DFBPOPIO0048 | YGGFM | Opioid peptide, Methionine-enkephalin | The pituitary gland of sheep | β-Lipotropin | 1975 |