Fig. 6

Neutrality plot of GC12 vs. GC3. GC12 were plotted against GC3. GC12 is the ordinate, and GC3 is the abscissa, so each point in the figure represents one LT-Ag gene from a different host organism. The neutrality plotting results for LT-Ag genes show that the distribution of GC12 is relatively concentrated, GC3 is during 0.171 (Delphinus delphis [short-beaked common dolphin]) to 0.596 (Pygoscelis adeliae [Adélie penguin]). Neutrality plotting results for two functional domains also show that the distribution of GC12 is relatively concentrated, while GC3 is incompactly dispersed in the range of 0.175 (Pongo pygmaeus [Bornean orangutan]) to 0.646 (Pygoscelis adeliae [Adélie penguin]) for DnaJ domains and 0.128 (Delphinus delphis [short-beaked common dolphin]) to 0.606 (Pygoscelis adeliae [Adélie penguin]) for helicase domains