It is important to remember that aquaporins do not actively transport water across the cell membrane; instead they facilitate the diffusion of water across the cell membrane. due to the slow diffusion of water across the lipid bilayer, aquaporins effectively increase the overall rate of water movement across the cell membrane.. Aquaporins are special channels made of protein and deposited into the cell membrane. similar to a tunnel, they let molecules travel through them, entering or exiting the cell.. A basic knowledge of aquaporins. aquaporin are channel proteins that allow the passive diffusion of water through them.aquaporins are membrane water channels that play critical roles in controlling the water contents of cells. these channels are widely distributed in all kingdoms of life, including bacteria, plants, and mammals..
Footnote: expression localization of aquaporins in kidney. aquaporin-1 is located in proximal tubule, descending thin limbs of henle, and vasa recta; aquaporin-2, aquaporin-3, aquaporin-4, aquaporin-5 and aquaporin-6 are in the collecting duct; aquaporin-7 and aquaporin-11 are expressed in proximal tubule. [source 62)]. aquaporin-1 is the first discovered water channel, and is located in the.
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