Figure 1: The expression level of ACE2, TMPRSS2, DDP4, and BSG in different cell types of human pancreas islet. (A) Scatter plots are visualized by RStudio software after data merging. The points colored blue are the cells expressing ACE2, TMPRSS2, DDP4 and BSG. (B) Violin plots show the gene expression level of ACE2, TMPRSS2, DDP4 and BSG in different cell types. (C) The size of the dot reflects the percentage of cells expressing a certain gene within a cell type, and color reflects the average expression level.