renal/urinary system
• in the proximal tubules baseline pHi is decreased to 7.38+/-0.02 compared to 7.49+/-0.01 in wild-type mice and the rate of apical Cl/HCO3- exchanger activity is decreased by 58%
• oxalate does not increase the rate of fluid absorption unlike in wild-type mice; however the baseline rate of fluid absorption is normal
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digestive/alimentary system
• basal, but not forskolin-stimulated, HCO3- secretion is decreased 30.5% in mucosal duodenal tissue and in the presence of an outward pH and HCO3- gradient uptake of Cl- is decreased by about 39% in apical membrane vesicles from the duodenum
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