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. 2021 Apr 8;112:104889. doi: 10.1016/j.bioorg.2021.104889

Fig. 1.

Fig. 1

Expression and characterization of SARS-CoV-2 Mpro. (a) SDS–PAGE of Mpro. Lane 1, protein marker; lane 2, Mpro before cleavage with HRV 3C-protease; lane 3, Mpro with native C and N termini. (b) the standard curve of fluorescent substrate Mca–AVLQSGFRK(Dnp)K for converting RFU to the amount of the cleaved substrate. (c) Line-weaver Burk plot of 0.1 µM Mpro with various concentrations of substrate.