|
|
|
| RECEPTOR |
||
| ACTIVATION |
||
| HETEROTRIMERIC
G PROTEINS |
|
|
|
| CYCLASE |
||
| ACTIVATION |
||
| γ |
| γ |
| $ |
| " |
| $ |
| " |
| GTP |
| GDP |
|
|
|
| NUCLEOTIDE |
||
| EXCHANGE |
||
| GTP |
| GDP |
| ATP |
| cAMP |
|
|
| HIGH INTRINSIC GTPase |
|
| = RAPID DEACTIVATION |
|
| Pi |