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.
The bootstrapped neighbor-joining phylogenetic tree of 31 archaea based on 16S RNA genes. It is rooted by E. coli K12. The number in parentheses after an organism name is the number of annotated raIS elements in that organism. The phylogenetic tree is constructed by MEGA version 3.1 [50].
