Fig. 2
From: Dietary nitrogen alters codon bias and genome composition in parasitic microorganisms
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