[Term] id: PR:000001115 name: alpha-1 adrenergic receptor def: "An adrenoceptor protein whose active form binds adrenaline and related compounds and whose activity is mediated by G proteins that activate a phosphatidylinositol-calcium second messenger system." [PRO:WCB, Wikipedia:Adrenergic_receptor] comment: Category=family. xref: PIRSF:PIRSF038550 is_a: PR:000044631 ! adrenoceptor protein