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. 2021 Dec 14;209:114538. doi: 10.1016/j.jpba.2021.114538

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Fig. 1 — Spray condition optimization for 3CLpro. Raw MS spectra (A) and deconvoluted spectra (B) of 3CLpro mainly in dimer (dark blue) or monomer (light blue) states. (C) The intensity of 3CLpro in NH₄Ac at different concentrations. (D) The intensity of 3CLpro in 10 mM NH₄Ac at different pH values. The influence of different proportions of DMSO (E), MeOH (F), or ACN (G) on the spray system. Experiments were repeated at least three times. Bars represent mean ± SD.