the steady state equations describing the interaction of polypeptide ligands with cell surface receptors under physiological conditions ( wiley , h.s. , and cunningham , d.d . ( 1981 ) cell 25 , 433-440 ) have allowed us to determine , under steady state conditions , the rate of insertion of receptors into the cell membrane , the endocytic rate constant of occupied receptors , the rate constant of turnover of unoccupied receptors , and the rate of hydrolysis of internalized ligand .
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C0007603
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