renal/urinary system
• cortical collecting ducts exhibit reduced sodium dependent intracellular pH changes independently of the presence or absence of sodium bicarbonate ion cotransport compared with wild-type cells
• cortical collecting duct fail to exhibit amiloride-resistant sodium and chloride ion absorption due to defective basolateral sodium bicarbonate ion cotransport unlike wild-type cells
• however, sodium-dependent bicarbonate flux is not fully abolished
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