as muscarinic receptors are structurally homologous to beta-adrenergic receptors , we have initiated studies to identify the protein kinase responsible for the phosphorylation of muscarinic receptors by determining whether the chick heart muscarinic receptor would serve as a substrate for the beta-adrenergic receptor kinase ( beta-ar kinase ) .
C0033640
protein kinase
C0031715
phosphorylation