Alpha-adrenoceptor subclassification.
D000818:Animals; D001369:Axons / Q000502:physiology; D009411:Nerve Endings / Q000502:physiology; D009638:Norepinephrine / Q000502:physiology; D011941:Receptors, Adrenergic / Q000145:classification*; D011942:Receptors, Adrenergic, alpha / Q000145:classification* / Q000378:metabolism
D011941:Receptors, Adrenergic; D011942:Receptors, Adrenergic, alpha; D009638:Norepinephrine