Catalog No. SBB-DE0129, 50 µg The human SARS-CoV-2 coronavirus harbors two proteases Papain Like Protease PLpro and 3CLpro (Chymotrypsin like Protease) or Mpro (Main-Protease) which is a C30-type cysteine protease. The viral genome encodes more than 20 proteins, with 3CLpro located within the non-structural protein 5 (nsp5) section of the viral polypeptide that cleaves together with PLpro polyproteins (PP1A and PP1AB) into individual functional components.