* Receptor family under development

5-Hydroxytryptamine receptors
Acetylcholine receptors (muscarinic)
Adrenoceptors
Adenosine receptors
Angiotensin receptors
Anaphylatoxin receptors*
Apelin receptor
Bile acid receptor
Bombesin receptors
Bradykinin receptors
Calcitonin receptors
Cannabinoid receptors
Calcium-sensing receptors
Chemokine receptors
Cholecystokinin receptors
Corticotropin-releasing factor receptors
Dopamine receptors
Endothelin receptors
Estrogen (G protein coupled) receptor
Formylpeptide receptors*
Frizzled receptors*
Free fatty acid receptors
Galanin receptors*
GABAB receptors
Ghrelin receptor
Glucagon receptor family
Glycoprotein hormone receptors
Gonadotrophin-releasing hormone receptors
GPRC5 receptors
Histamine receptors
KiSS1-derived peptide receptor
Leukotriene receptors*
Lysophospholipid receptors*
 Melatonin receptors
Melanocortin receptors
Metabotropic glutamate receptors
Melanin-concentrating hormone receptors
Motilin receptor*
Neurotensin receptors
Neuromedin U receptors
Neuropeptide S receptor
Neuropeptide Y receptors
Neuropeptide W/neuropeptide B receptors
Neuropeptide FF/neuropeptide AF receptors
Nicotinic acid receptor family
Opioid receptors
Orexin receptors
P2Y receptors
Parathyroid hormone receptors
Peptide P518 receptor*
Platelet-activating factor receptor
Prostanoid receptors
Prokineticin receptors
Protease-activated receptors*
Prolactin-releasing peptide receptor
Relaxin family peptide receptors
Somatostatin receptors
Tachykinin receptors*
Thyrotropin-releasing hormone receptor
Trace amine receptor
Urotensin receptor
Vasopressin and oxytocin receptors*
VIP and PACAP receptors


Class A Orphans
Class B Orphans
Class C Orphans
Non-signalling 7TM chemokine-binding proteins

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