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porin Syllabification: po·rin
Pronunciation: /ˈpôrən/

Definition of porin in English:


Any of a class of proteins whose molecules can form channels (large enough to allow the passage of small ions and molecules) through cellular membranes.
Example sentences
  • These molecular sieving properties are due to a major class of proteins called porins that form trimeric channels in the outer membrane.
  • This function is accomplished by a number of membrane channel proteins called porins, which display a wide range of permeability profiles.
  • Bacterial outer membrane porins are classified into channels specific for the uptake of nutrients, such as maltose or sucrose, and unspecific pore proteins.


1970s: from Greek poros 'pore' + -in1.

Definition of porin in:
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