Nucleotide frequency at flanking positions of dicodon NNT•GNN.

<p>Species names are described in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0003612#pone-0003612-t001" target="_blank">Table 1</a>. The results of Ci and Cs were obtained from homologous fragments between Ci and Cs, and those of Tr and Dr were obtained from homologous fragments between Tr and Dr. Conserved dicodon NNT•GNNs were located and nucleotide frequencies at the second positions of both codons were measured.