Table 1.

Tissue-cell specific localization of AQPs in lung.

S.No	AQP isoform	Localization	Reference
1	AQP1	Airways and alveoli- microvascular endothelial cells; Parietal and visceral pleura- microvessels and mesothelial cells.	[19] With original references cited therein.
2	AQP3	Large airways and nasopharynx- basolateral membrane of basal epithelial cells; human small airway- epithelia.
3	AQP4	Trachea, bronchus and nasopharyngeal region- basolateral membrane of ciliated columnar epithelial cells.
4	AQP5	Nasopharyngeal subepithelial glands- apical membrane of acinar cells; distal lung- apical membrane of type-I alveolar epithelium