Fig. 4.
Evolutionary model explaining the similarity of viral polA genes and those of two families of the Aquificae, some unrelated Bacteria, and the Apicomplexa.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.