Fig. 1.

Genomic mutation analysis in the N gene region of SARS-CoV-2 strains from different geographical origins. (a) Novel 12-nt deletions in N gene region of viral strains from North Americans (#13 to #18). (b) 5 amino acid deletions from 206 to 210 positions and insertion of leucine at position 210 (p.Ser206_Met210delinsLeu). Raw sequence reads were trimmed for removal of low-quality bases and for length and assembled by mapping to the reference genome (GenBank accession number: NC_045512.2) from Wuhan, China. Among all samples shown in Table 1, only the 10 strains (7 strains from North American (#2 and #13 to #18), 1 from Finnish (#4), and 2 from Korean (#9 and #11) that were successfully analyzed by WGS.