Fig. 3
From: Oligonucleotide usage in coronavirus genomes mimics that in exon regions in host genomes
Level of adaptation of each di- and tri-nucleotide to the human cellular environment in SARS-CoV-2. A, B The level of adaptation of the human- and bat-type oligonucleotides in the three virus types (human-CoV, bat-CoV, and SARS-CoV-2) is displayed. This level is the ratio of the averaged oligonucleotide frequency in each virus to the baseline, which is the midpoint between human- and bat-CoV frequencies. The ratio of SARS-CoV-2 for each oligonucleotide was displayed as an orange-filled circle surrounded by a black line, and those of human- or bat-CoV was displayed as a green or blue circle, respectively