Human B1 and B2 receptor nomenclature
| International Union of Pharmacology (IUPHAR) name | B1 | B2 |
| IUPHAR code | 2.1:BK:1:B1:HUMAN:00 | 2.1:BK:2:B2:HUMAN:00 |
| Alternate names | Bradykinin B1 | Bradykinin B2 |
| Amino acid composition | 353 | 391a |
| Gene/chromosome | BDKRB1/14q32.2 | BDKRB2/14q32.2 |
| Gene accession no. | U12512 | M88714 |
| SwissProt accession no. | P46663 | P30411 |
| Selective agonist | Lys-des-Arg9-BK | BK |
| Selective antagonist | Lys-[Leu8]des-Arg9-BK | Icatibant |
| Primary G protein coupling | Gαq/Gαi | Gαq/Gαi |
| Primary regulation | ||
| Expression | Induction | Constitutive |
| Signaling | Limited desensitization | Extensive desensitization |
↵ a Includes N-terminal sequence coded in exon 2 (27 residues; AbdAlla et al., 1996a)