"City-dweller" Natural Recordings by Native Speakers
A person who lives in a city.
Citrullinemia is a rare genetic disorder caused by a deficiency of the enzyme citrulline transaminase, which is necessary for the breakdown of the amino acid citrulline in the liver. It is a disorder of amino acid metabolism.
Citrullination is a post-translational modification of proteins in which an amino acid called citrulline is inserted into the protein in place of the amino acid arginine. This process is often referred to as a "deimination" reaction. Citrullination is a key step in the formation of citrullinated proteins, which have been implicated in various physiological and pathological processes, including autoimmune diseases such as rheumatoid arthritis and cancer.