– Forms a water-specific channel that provides the plasma membranes of renal collecting duct with high permeability to water, thereby permitting water to move in the direction of an osmotic gradient. Plays an essential role in renal water homeostasis. AQP2 Protein, Mouse, Recombinant (His) is expressed in E. coli expression system with N-10xHis tag. The predicted molecular weight is 30.5 kDa and the accession number is P56402.