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. 2020 Dec 10;15(12):e0239566. doi: 10.1371/journal.pone.0239566

Fig 2. Phylogenetic analysis of the reference S protein of SARS-CoV-2 with four seasonal human CoVs (NL63, HKU1, 229E and OC43).

Fig 2

The phylogenetic tree was performed using the maximum likelihood method and JTT model with a bootstrap of 1000 replicates within the Mega-X software. Scale bar indicates the number of substitutions per site for the trees. The accession number for S proteins of SARS-CoV-2, HCoV-NL63, HCoV-HKU1, HCoV-229E and HCoV-OC43 are QHD43416.1, APF29063.1, BBA20983.1, AAG48592.1 and CAA83661.1, respectively.