Noun
English Wikipedia has an article on:selenoproteinWikipedia
selenoprotein (plural selenoproteins)
(biochemistry) Any of many proteins that include a selenocysteine or selenomethionine residue.
Selenium is incorporated into several prokaryotic selenoprotein families in bacteria, archaea, and eukaryotes as selenocysteine, citation where selenoprotein peroxiredoxins protect bacterial and eukaryotic cells against oxidative damage. Source: Internet