Fig. 1From: Ginkgolic acid and anacardic acid are specific covalent inhibitors of SARS-CoV-2 cysteine proteasesSARS-CoV-2 PLpro expression and characterization. a SDS-PAGE of purified PLpro. Lane M: protein ladder; lane 1: tagged-PLpro; lane 2: authentic PLpro. b Michaelis–Menten plot of 100 nM PLpro with various concentrations of fluorometric substrate. The best-fit Km = 70.92 ± 10.15 µMBack to article page