Pie-charts show the abundance of double-stranded DNA (dsDNA), single-stranded DNA (ssDNA), dsRNA, ssRNA(+) and ssRNA(−), where + and – refer to the orientation of the strand relative to coding DNA, and retrotranscribing viruses in Archaea, Bacteria, and Eukarya, and within the major eukaryal divisions. Corresponds to Figure 1(A) in Nasir et al. (2014).
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