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. 2021 Jun 10;778:138819. doi: 10.1016/j.cplett.2021.138819

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Fig. 6 — The average distances between C_α atoms for (a) the SARS-CoV-2 nsp12 with Mg²⁺, (b) the SARS-CoV-2 nsp12 without Mg²⁺, and (c) the SARS-CoV nsp12. (d) The ratios calculated from differences between the average distances for the SARS-CoV-2 nsp12 with Mg²⁺ and those for the SARS-CoV-2 nsp12 without Mg²⁺. (e) The ratios calculated from differences between the average distances for SARS-CoV and those for SARS-CoV-2 without Mg². The brown square shows residues that have large differences.