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What does ubiquitin mean?

Looking for the meaning or definition of the word ubiquitin? Here's what it means.

Noun
  1. (biochemistry) Any of a class of small protein, or polypeptide, present in the cells of all eukaryotes, that play a part in modifying and degrading proteins.
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Ubp3 is a deubiquitination enzyme and a member of a large family of cysteine proteases that cleave ubiquitin moieties from protein substrates.
For ubiquitin, the only one of the four proteins with a net positive charge at pH 7, the interaction of the dipole moment with the average electric field dominates.
Ubiquitination is an essential biochemical process which occurs in all cells of our body and consists of the attachment of a small protein called ubiquitin to various cellular proteins.
Use of the protein UK114, possibly in combination with ubiquitin, for the preparation of pharmaceutical or veterinary compositions for the treatment of leishmaniasis in humans and animals.
Like other such molecules, it tags specific proteins for degradation by attaching a small protein marker called ubiquitin to them.
The protein is linked to a second protein, ubiquitin, when the cell detects that DNA damage has occurred.

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