when cell membranes were first treated with agents that cleave disulfides of proteins , immunoblots of these membranes revealed intense immunoreactive bands with electrophoretic mobility similar to that of protein standards of mr 65,000-67,000 , comigrating with purified , reduced , and alkylated beta-adrenergic receptors .
C0007603
cell membranes
C0034785
beta-adrenergic