Share this entry
ubiquitin Syllabification: u·bi·qui·tin
Pronunciation: /yo͞oˈbikwidən/

Definition of ubiquitin in English:


A compound found in living cells that plays a role in the degradation of defective and superfluous proteins. It is a single-chain polypeptide.
Example sentences
  • This suggests that independent protein degradation pathways for ubiquitin, as well as for the proteasome complex, may exist in strawberry fruit.
  • The protein is linked to a second protein, ubiquitin, when the cell detects that DNA damage has occurred.
  • Ubp3 is a deubiquitination enzyme and a member of a large family of cysteine proteases that cleave ubiquitin moieties from protein substrates.


1970s: from ubiquitous + -in1.

Definition of ubiquitin in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove adverts and access premium resources