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.
Phylogenetic tree showing the affiliations of 16S rDNA clone sequences to selected reference sequences of the δ subclass of Proteobacteria. The tree was calculated by neighbor-joining analysis and corrected with filters which considered only 50% conserved regions of the 16S rRNA of δ-Proteobacteria. 16S rDNA clone sequences are in boldface type. The bar represents 10% estimated sequence divergence.
