| Nomenclature | α2A-adrenoceptor | α2B-adrenoceptor | α2C-adrenoceptor |
| HGNC, UniProt | ADRA2A, P08913 | ADRA2B, P18089 | ADRA2C, P18825 |
| Principal transduction | Gi/o | Gi/o | Gi/o |
| Selective agonists (pKi) | oxymetazoline (Partial agonist) (8.0) 365,403, guanfacine (7.1) 374 | – | – |
| Selective antagonists (pKi) | BRL 44408 (8.2–8.77) 403,414 | imiloxan (7.3 - Rat) 379 | JP1302 (pKB 7.8) 392 |
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