ubiquitin

== English == === Etymology === From ubiquitous +‎ -in. === Pronunciation === IPA(key): /juːˈbɪkwɪtɪn/ === Noun === ubiquitin (plural ubiquitins) (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. ==== Derived terms ==== ==== Related terms ==== ==== Translations ==== === References ===