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. 2009 Mar 23;106(14):5865–5870. doi: 10.1073/pnas.0901260106

Fig. 4.

Fig. 4.

CvP values indicate the ancestor of the Thermotogales was an extreme thermophile. (A) Distribution of CvP values for predicted proteins of Thermotogales' ancestral proteome. The results of reconstruction with 2 different programs are shown (see Methods). (B) Extrapolation of optimal growth temperature for the ancestral Thermotogales proteome. Red points represent median CvP values and optimal growth temperature of 5 contemporary Thermotogales genomes. A strong linear correlation is observed between CvP values and optimal growth temperature. The median CvP value of the ancestral proteome is based on 423 inferred ancestral protein sequences.