title: Anion and proton transport.
mesh_terms: D000818:Animals; D000838:Anions / Q000378:metabolism*; D001692:Biological Transport; D004848:Epithelium / Q000378:metabolism; D006801:Humans; D008566:Membranes / Q000378:metabolism; D011522:Protons
chemical_list: D000838:Anions; D011522:Protons