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Fig. 8. Effect of zinc (20 µmol l1) and glycyl-sarcosine
(Gly-Sar; 100 µmol l1) on the kinetics of transmural
transport of 3H-L-histidine (150 µmol
l1) measured over 30 min time intervals at each luminal
3H-L-histidine concentration. Unidirectional fluxes were
calculated from regression slopes determined over this time interval for each
3H-L-histidine concentration. Values displayed are means
± S.E.M. of 3 replicates per concentration.