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. 2021 Jan 6;13(1):67. doi: 10.3390/v13010067

Figure 1.

Figure 1

Mapping of the amino acid residues corresponding to the selected SNPs used in this study. The positions of the amino acid residues corresponding to the selected SNPs are marked in red on the crystal structure of ACE2 (1R42). Three amino acid positions (N637, L656, and N720) are not shown here because the regions containing these amino acids are not present in this crystal structure. The three separate regions reported to be important for binding to SARS-CoV-S are colored in yellow, magenta, and orange.