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(A) Molecular docking of UA-30 to S protein (PDB: 6VXX). S1 subunit, S2 subunit, UA-30, and key residues are shown as green ribbon, blue ribbon, white sticks, and yellow stick, respectively. Light green dashes in the interaction plot indicating hydrogen bonds. (B) Antiviral efficacy of UA-30 against SARS-CoV-2 PsV mutants caused by site-directed mutation, including N764A/R765A, Q957A/K964A, and N764A/R765A/Q957A/K964A.
