Fig. 4
From: Oligonucleotide usage in coronavirus genomes mimics that in exon regions in host genomes
Changes observed for five variants of SARS-CoV-2. The cumulative bar chart shows the difference in the number of oligonucleotide loci per 30Â kb (approximate length of the viral genome) from that of SARS-CoV-2 isolated in December 2019. The numbers of changes in alpha, beta, delta, gamma, and omicron are shown in dark blue, orange, gray, yellow, and light blue, respectively. A Change in the number of oligonucleotide loci for (Ai) unachieved and (Aii) achieved human-type dinucleotides. B Change for (Bi) unachieved and (Bii) achieved bat-type dinucleotides. C, D Change for (Ci, Di) unachieved and (Cii, Dii) achieved human- or bat-type trinucleotides, respectively