participates in obsolete activation of MAPK activity behavioral fear response synaptic transmission, dopaminergic response to amphetamine cellular calcium ion homeostasis negative regulation of adenylate cyclase activity adenylate cyclase-inhibiting dopamine receptor signaling pathway response to histamine regulation of dopamine metabolic process dopamine metabolic process behavioral response to cocaine behavioral response to ethanol arachidonic acid secretion negative regulation of protein secretion inhibitory postsynaptic potential D(4) dopamine receptor Homo sapiens protein D(4) dopamine receptor (human) Reactome:R-HSA-390809 DTO:02100084 Category=organism-gene. D(2C) dopamine receptor (human) PR:P21917 DRD4 protein dopamine D4 receptor (human) UniProtKB:P21917 hDRD4 A D(4) dopamine receptor that is encoded in the genome of human.