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Background
Normal gastrointestinal motility depends on electrical slow‐wave activity generated by interstitial cells of Cajal (ICC) in the tunica muscularis of the gastrointestinal tract. A requirement for HCO3− in extracellular solutions used to record slow waves indicates a role for HCO3− transport in ICC pacemaking. The Slc4a4 gene transcript encoding the electrogenic Na+/HCO3− cotransporter,...