Aquaporin-5 is a protein that in humans is encoded by the AQP5 gene.
Aquaporin 5 (AQP5) is a water channel protein. Aquaporins are a family of small integral membrane proteins related to the major intrinsic protein (MIP or AQP0). Aquaporin 5 plays a role in the generation of saliva, tears and pulmonary secretions. AQP0, AQP2, AQP5, and AQP6 are closely related and all map to 12q13.
This article incorporates text from the United States National Library of Medicine, which is in the public domain.