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. 2021 Oct 8;11:20012. doi: 10.1038/s41598-021-99404-8

Figure 2.

Figure 2

Cytotoxicity of GCPQs in vitro. Cell viability was assessed using an XTT assay on Vero E6 cells (A) and A549ACE2+ cells (B). Relative viability of cells (percentage of the untreated control) is shown on y-axis. All assays were performed in triplicate, and average values with standard errors are presented. The letters a to d refer to the GCPQs shown in Table 2. All assays performed in triplicate and analysed by one-way ANOVA with Tukey's post hoc test. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001.The IC50 values for GCPQa, GCPQb, GCPQc and GCPQd in the Vero E6 cell line are 100 μg/mL, > 200 μg/mL, > 200 μg/mL and > 200 μg/mL respectively. The IC50 values for GCPQa, GCPQb, GCPQc and GCPQd in the A549ACE2+ cell line are > 25 μg/mL, > 200 μg/mL, > 100 μg/mL and > 200 μg/mL respectively.