Avenin is the prolamin (protein high in proline and glutamine) found in oats. Prolamins are a group of globulin proteins found in grasses, most prominently the cereal crops such as wheat (gliadin), barley (secalin), rye (hordein) and oats (avenin). ... L-Proline is one of the twenty proteinogenic units which are used in living organisms as the building blocks of proteins. ... Glutamine is one of the 20 amino acids encoded by the standard genetic code. ... Species References ITIS 41455 2002-09-22 Oats are the seeds of any of several cereal grains in the genus Avena. ...