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β-Endorphin (1-27) (human) is an opioid antagonist that selectively binds to μ-, δ-, and κ-opioid receptors, with dissociation constants (Kis) of 5.31, 6.17, and 39.82 nM, respectively. It inhibits analgesia induced by both β-Endorphin and etorphine [1][2].

| Pack Size | Price | Availability | Quantity |
|---|---|---|---|
| 5 mg | Inquiry | Backorder | |
| 50 mg | Inquiry | Backorder |
| Description | β-Endorphin (1-27) (human) is an opioid antagonist that selectively binds to μ-, δ-, and κ-opioid receptors, with dissociation constants (Kis) of 5.31, 6.17, and 39.82 nM, respectively. It inhibits analgesia induced by both β-Endorphin and etorphine [1][2]. |
| Molecular Weight | 3022.47 |
| Formula | C139H217N33O40S |
| Cas No. | 76622-84-9 |
| Sequence | Tyr-Gly-Gly-Phe-Met-Thr-Ser-Glu-Lys-Ser-Gln-Thr-Pro-Leu-Val-Thr-Leu-Phe-Lys-Asn-Ala-Ile-Ile-Lys-Asn-Ala-Tyr |
| Sequence Short | YGGFMTSEKSQTPLVTLFKNAIIKNAY |
| Storage | keep away from moisture | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice/Shipping at ambient temperature. |

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