Pfizer's drug "Paxlovid" is a 3CL protease inhibitor, a type of antiviral medication that has been used against HIV, the virus that causes AIDS.
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Co-evolution of multipartite interactions between an extended tmRNA tag and a robust Lon protease in Mycoplasma
https://pubmed.ncbi.nlm.nih.gov/19912542/
Proteases as Secreted Exoproteins in Mycoplasmas from Ruminant Lungs and Their Impact on Surface-Exposed Proteins
RE: Hydrogen