OR2D2

{{Short description|Protein-coding gene in the species Homo sapiens}}

{{Infobox_gene}}

Olfactory receptor 2D2 is a protein that in humans is encoded by the OR2D2 gene.{{cite journal |vauthors=Buettner JA, Glusman G, Ben-Arie N, Ramos P, Lancet D, Evans GA | title = Organization and evolution of olfactory receptor genes on human chromosome 11 | journal = Genomics | volume = 53 | issue = 1 | pages = 56–68 |date=Dec 1998 | pmid = 9787077 | doi = 10.1006/geno.1998.5422 }}{{cite web | title = Entrez Gene: OR2D2 olfactory receptor, family 2, subfamily D, member 2| url = https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=120776}}

Olfactory receptors interact with odorant molecules in the nose, to initiate a neuronal response that triggers the perception of a smell. The olfactory receptor proteins are members of a large family of G-protein-coupled receptors (GPCR) arising from single coding-exon genes. Olfactory receptors share a 7-transmembrane domain structure with many neurotransmitter and hormone receptors and are responsible for the recognition and G protein-mediated transduction of odorant signals. The olfactory receptor gene family is the largest in the genome. The nomenclature assigned to the olfactory receptor genes and proteins for this organism is independent of other organisms.