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. 2021 Apr 17;190:105075. doi: 10.1016/j.antiviral.2021.105075

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Fig. 4 — Fluorescence resonance energy transfer (FRET)-based 3CL^proenzymatic inhibition assay. The inhibitions of CHLA (A) and PUG (B) against 3CL^pro were determined using a FRET-based cleavage assay. For each compound, the IC50 value is displayed in the upper left corner. The data represent mean ± standard deviation (SD) of the triplicate measurements.