Definition of porin in English:


Syllabification: po·rin
Pronunciation: /ˈpôrən


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.
More 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:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day bogle
Pronunciation: ˈbəʊɡ(ə)l
a phantom or goblin