Additional file 2.

Nucleotide use and AT and CG skew in chelicerate mitochondrial protein-coding genes. Genes are arranged in the linearized order that they occur in the mitochondrial genome. Orange shading indicates genes found on the major strand, whereas gold indicates genes located on the minor strand. Nucleotide use and skew is shown for each of the three codon positions for each gene. The red to blue shading in the AT skew and CG skew columns indicate the degree of skew they possess, with the darker shading indicating greater skew. Blue indicates and excess of that nucleotide, red indicates a deficiency of that nucleotide.

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Ovchinnikov and Masta BMC Evolutionary Biology 2012 12:31   doi:10.1186/1471-2148-12-31