cholesterol , a major structural component of plasma membranes , has a profound influence on cell surface receptor characteristics and on adenylate cyclase activity . beta-adrenergic receptor number , adenylate cyclase activity , and receptor-cyclase coupling were assessed in rat lung membranes following preincubation with cholesteryl hemisuccinate . beta-adrenergic receptor number increased by 50 % without a change in antagonist affinity .
C0007603
plasma membranes
C0001643
beta-adrenergic receptor