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. 2014 Sep 25;9(9):e107319. doi: 10.1371/journal.pone.0107319

Figure 1. Base, codon, and amino acid frequency-based heat maps.

Figure 1

The x-axis and y-axis represent 2670 prokaryotic genomes with GC content arranged from smallest to largest. a) Base frequency-based heat map; maximum base distance = 1.0986. b) Codon frequency-based heat map; maximum codon distance = 1.4199. c) Amino acid frequency-based heat map; maximum amino acid distance = 1.0725.