| No. | DFBP ID | AA sequence | Peptide/Function name | Organism/Source | Precursor protein | PubDate |
| 1 | DFBPOPIO0008 | RYLGYL | Opioid peptide, Exorphin, Exomorphin, α-Casein exorphin [3] | Bovine milk protien | αs1-Casein | 1983 |
| No other studies with the same sequence were reported. | ||||||