catalyzed by has input has output coronaviral pp1ab cleavage SARS-CoV-2 viral process to host SARS-CoV-2 pp1ab cleavage Anthony Huffman, Oliver He https://en.wikipedia.org/wiki/Severe_acute_respiratory_syndrome_coronavirus_2 SARS-CoV-2 replication polyprotein 1ab cleavage 3C-like proteinase (SARS-CoV-2) 3C-like proteinase nsp5 (SARS-CoV-2) rep gene proteolytic cleavage product (SARS-CoV-2) replicase polyprotein 1ab (SARS-CoV-2)