Selenocysteinehas been referred to as the “21st amino acid”[14]. It is coded by UGA, which functions primarily as astop codonbut can be translated into an amino acid in the presence of the selenocysteineinsertion sequence(SECIS) in the 3′ UTR of mammals[15]. The proteins containing sele...
In humans, coronaviruses cause respiratory infections, including the common cold. In other species, symptoms can vary: in chickens, they lead to upper respiratory diseases, while in cows and pigs, the symptoms include diarrhea. The viral entry in human cells is mediated by ACE2 as their recept...