Nucleotide composition bias in the Platyhelminthes analyzed.

<p>A) Relationship between A+T content and NB3 (NB at the third position of four-fold degenerate codons) values. Green squares and red circles indicate free-living and parasitic platyhelminths, respectively. The surveyed species are shown in numbers: 1, <i>T</i>. <i>sigani</i>; 2, <i>F</i>. <i>hepatica</i>; 3, <i>D</i>. <i>balaenopterae</i>; 4, <i>B</i>. <i>hoshinai</i>; 5, <i>T</i>. <i>saginata</i>; 6, <i>S</i>. <i>japonicum</i>; 7, <i>C</i>. <i>alpina</i>; 8, <i>Obama</i> sp.; 9, <i>S</i>. <i>mediterranea</i>; 10, <i>D</i>. <i>japonica</i>. B) Values of the different NB-based statistic across species. C) Relationship between A+T content for different genome portions and A+T content for the third positions.