Fig. 11. Effect of external Ox2 concentration on the uptake of 0.1
mmol l1 [14C]Ox2 into
hepatopancreatic BBMV. Vesicles were preloaded with 100 mmol
l1 TMA-Cl, 50 mmol l1 K-gluconate and 50
µmol l1 valinomycin. Incubation media contained 100 mmol
l1 TMA-gluconate, 50 mmol l1 K-gluconate
and indicated oxalate concentrations. All media contained 40 mmol
l1 Hepes-Tris at pH 7.0.