. "\"Combining with the biogenic amine serotonin and transmitting the signal across the membrane by activating an associated G-protein. Serotonin (5-hydroxytryptamine) is a neurotransmitter and hormone found in vertebrates and invertebrates.\" [CHEBI:28790, GOC:ai]" . . "serotonin receptor activity" . "5-hydroxytryptamine receptor" . "5-HT receptor" . "G protein coupled serotonin receptor activity" . "G-protein coupled serotonin receptor activity" . "G-protein-coupled serotonin receptor activity" . "Wikipedia:5-HT_receptor" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .