| No. | DFBP ID | AA sequence | Peptide/Function name | Organism/Source | Precursor protein | PubDate |
| 1 | DFBPOPIO0003 | YLLF | Opioid peptide, β-Lactorphin | Bovine milk protien | β-Lactoglobulin | 2014 |
| 2 | DFBPOPIO0075 | YLLF | Opioid peptide, β-Lactorphin | Bovine milk protien [1] | β-Lactoglobulin | 1986 |