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. 2021 Feb 10;215:113267. doi: 10.1016/j.ejmech.2021.113267

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Fig. 6 — Predicted m-calpain (PDB ID: 3BOW) [44] bound structures of MG132 (A) and 17 (B); (C) Superposition of the structures of MG132 (green stick) and 17 (cyan stick) bound to m-calpain (wheat cartoon). (D) Predicted structure of 17 (cyan stick) bound to SARS-CoV-2 main protease (PDB ID: 6Y2F) [43].