Homology models were prepared using the publicly accessible online Swissmodel programs, searching the SWISS-MODEL template library (SMTL version 2020-01-02, and PDB release 2019-12-27). Model 6 included an allosteric SARS PLpro inhibitor carried through from the PDB:3e9s template. 3 Templates did not contain the structural zinc atom, resulting in models 3,7,10 also having no zinc atoms. These were included in the study however to examine the effect of lack of zinc on model stability in the fingers region in molecular dynamics simulations. Model 9 was produced as a homodimer.