Passive Transport of Water out of Cell by Aquaporin-3 Aquaporin-3 (AQP3) passively transports water and glycerol across the plasma membrane according to the osmotic gradient. AQP3 is expressed in airway epithelia, secretory glands, skin, the collecting ducts of the kidney, and the basolateral surface of intestinal epithelium.. Authored: May, B, 2009-08-06 Edited: May, B, 2009-08-06 Pubmed15703994 Pubmed18678926 Pubmed7503232 Pubmed7526388 Pubmed7538665 Pubmed8063828 Pubmed9369468 Pubmed9374639 Pubmed9374640 Reactome Database ID Release 43445714 Reactome, http://www.reactome.org ReactomeREACT_23789 Reviewed: Beitz, E, 2010-06-24 Reviewed: Calamita, G, 2010-07-15 Reviewed: Mathai, JC, MacIver, B, 2010-07-31