when human erythroleukemic ( k562 ) cells were incubated with 25 microm trifluoperazine ( tfp ) , a drug that inhibits both calmodulin-dependent and calcium-activated phospholipid-dependent kinases , the number of transferrin receptors detected on the cell surface was reduced to approximately half with no change in the affinity of the remaining surface receptors .
C0007634
cells
C0699040
cell surface