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| Peptide name | Sequence | MW |
| DPDPE | Tyr-DPen-Gly-Phe-DPen | 645.8 |
| [DPen2, Pen5] Enkephalin | Tyr-DPen-Gly-Phe-Pen | 645.8 |
| [Des-Tyr1,DPen2,5] Enkephalin | DPen-Gly-Phe-DPen | 482.6 |
| [Des-Tyr1,DPen2,Pen5] Enkephalin | DPen-Gly-Phe-Pen | 482.6 |
| [DPhe2,5,(pCl)Phe4] Enkephalin | Tyr-DPen-Gly-(pCl)Phe-DPen | 680.3 |
| Met-Enkephalin | Tyr-Gly-Gly-Phe-Met | 573.7 |
| [Met5,Arg6,7,Val8,Gly9] Enkephalin | YGGFMRRVG | 1042.2 |
| Preproenkephalin B (186-204), human | SSEVAGEGDGDSMGHEDLY | 1955.0 |
| [Des-Tyr1] Leu-Enkephalin | GGFL | 392.6 |
| [Des-Tyr1] Met-Enkephalin | GGFM | 410.5 |
| Leu-Enkephalin, amide | YGGFL-NH2 | 554.7 |
| [Leu5]-Enkephalin | YGGFL | 555.7 |
| Met-Enkephalin, amide | YGGFM-NH2 | 572.7 |
| [Met5]-Enkephalin | YGGFM | 573.8 |
| [Ala2] Met-Enkephalin, amide | YAGFM-NH2 | 586.7 |
| [Lys6] Leu-Enkephalin | YGGFLK | 683.9 |
| [Arg0] Met-Enkephalin | RYGGFM | 729.9 |
| [Met5,Arg6] Enkephalin | YGGFMR | 729.9 |
| [Met5,Arg6,Phe7] Enkephalin, amide | YGGFMRF-NH2 | 876.1 |
| [Met5,Arg6,Phe7] Enkephalin | YGGFMRF | 877.0 |
| Spinorphin, bovine | LVVYPWT | 877.1 |
| [Met5,Arg6] Enkephalin-Arg | YGGFMRR | 886.1 |
| [Met5,Arg6,Gly7,Leu8] Enkephalin | YGGFMRGL | 900.1 |
| Dermenkephalin | YDMFHLMD-NH2 | 955.3 |
