although iec-6 cells possess sites with high affinity for nitrobenzylthioinosine , a potent inhibitor of equilibrative ( facilitated diffusion ) nucleoside transport systems in certain cell types , the inhibitor had only minor effects on formycin b uptake in iec-6 cells , but reduced efflux of the analog from these cells .
C2244328
facilitated diffusion
C0007634
cells