noun, plural: intrinsic proteins
Any of the group of integral membrane proteins that facilitate specific transport of water molecules (e.g. by aquaporins), and of neutral solutes (e.g. glycerol by glycerol facilitators).
Examples of intrinsic proteins are:
Word origin: ML intrinsecus inward (adjective), L (adverb), equiv. to intrin- (int(e)r-.
Synonym: integral membrane protein (IMP).
Compare: extrinsic protein.
See also: cell membrane, fluid mosaic model.