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. 2020 Sep 24;10:15643. doi: 10.1038/s41598-020-72533-2

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© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2020

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Heat maps of log transformed codon pair frequencies per 1 M for Homo sapiens Genomic (A), SARS-CoV-2 (B) and the absolute value of difference between the two (C). Codon pairs increase in frequency from dark to light.