Using the quick search there are shown up to three reports about Ubiquitin:
Uch37 is a “deubiquitinating enzyme” that can remove protein tags (called ubiquitin) from other proteins. The presence of one kind of ubiquitin tag on a protein can mark it for destruction, but others...
Biowissenschaften Chemie |Using the fulltext-search for the word Ubiquitin you can set up serveral searching-options > choose search options