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. 2020 Jun 18:1–12. doi: 10.1080/07391102.2020.1779128

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Figure 1. — Structure of 3CLpro (SARS-COV-2) retrieved from RCSB using accession number (6LU7). (A) showing the domains architecture of three different domains. (Domain 1) magenta, (Domain 2) orange, (Domain 3) cyan, (Connecting loops) grey while the drug molecule in the active site is shown in yellow colour as sphere. (B) The electrostatic potential of 3CLPro and displays the important active site residues in the sticks, including the two essential residues His41 and Cys145 (catalytic dyad).