when the quantities of radioactivity in these three fractions ( plasma membrane-bound , internalized , and degraded ) were added together to obtain a value for the total amount of [ 125i ] iodo-hcg that had been bound to receptor during the 48-h time course ( total receptor-associated [ 125i ] iodo-hcg ) , the value for control cells was not significantly different from the value for chx-treated cells .
C0007603
plasma membrane
C0007634
cells