| GO:0016021 | integral component of membrane | 50 |
| GO:0004930 | G-protein coupled receptor activity | 47 |
| GO:0004715 | non-membrane spanning protein tyrosine kinase activity | 3 |
| GO:0007198 | adenylate cyclase-inhibiting serotonin receptor signaling pathway | 2 |
| GO:0007208 | phospholipase C-activating serotonin receptor signaling pathway | 2 |
| GO:0007210 | serotonin receptor signaling pathway | 2 |
| GO:0004993 | serotonin receptor activity | 2 |
| GO:0001586 | Gi/o-coupled serotonin receptor activity | 2 |
| GO:0008227 | G-protein coupled amine receptor activity | 2 |
| GO:0005886 | plasma membrane | 2 |
| GO:0007615 | anesthesia-resistant memory | 1 |
| GO:0004977 | melanocortin receptor activity | 1 |
| GO:0045187 | regulation of circadian sleep/wake cycle, sleep | 1 |
| GO:0009649 | entrainment of circadian clock | 1 |
