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.
A rooted neighbor-joining phylogram of the partial nirS sequences. The scale bar indicates the expected number of changes per sequence position. For each node, bootstrap values greater than 50% are shown. The GenBank accession number is indicated in brackets after the name of the organism. The sequence of nirN from Pseudomonas aeruginosa was used as the out-group to root the phylogram
