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. 2016 Nov 15;17:226. doi: 10.1186/s13059-016-1087-9

Fig. 2.

Fig. 2

Nitrogen availability influences gene sequences. a The average mRNA nitrogen content per codon for 3003 orthologous genes in the Kinetoplastida. b The average nitrogen content per double stranded codon (dsDNA) for the same genes. c As in a but for 168 orthologous Mollicute genes. d As in b but for the Mollicutes. The y-axis is the probability density function (PDF) for the distributions