Medical Dictionary

aquaporin

noun aqua·por·in \ ˌa-kwə-ˈpȯr-ən \

medical Definition of aquaporin

: any of several proteins that are found in cell membranes and selectively permit water to pass into and out of the cell
  • Several scientific groups are now directing their attention to the aquaporins, a large family of water transport molecules whose members each have unique tissue distributions in kidney.
  • —Peter AgreProceedings of the National Academy of ScienceAugust 1998
  • Water passes through the cell membrane via channels called aquaporins. These channels are so small that water molecules travel through in single file, while larger molecules cannot enter.
  • —Julie RehmeyerNew Scientist1 July 2006

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