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Fig. 4. Effect of membrane potential on the uptake of 0.1 mmol l1
[14C]oxalate uptake into hepatopancreatic BBMV. Vesicles were
preloaded with 100 mmol l1 TMA-gluconate and 100 mmol
l1 TMA-Cl (
) or 100 mmol l1
K-gluconate and 100 mmol l1 TMACl (
, ).
Incubation media contained 100 mmol l1 K-gluconate and 100
mmol l1 TMA-gluconate (
,
) or 200 mmol
l1 TMA-gluconate (). All media contained 40 mmol
l1 Hepes-Tris and 50 µmol l1
valinomycin at pH 7.0.