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.
Distance phylogram of partial nirK gene product sequences. Bootstrap values are based on 1,000 replicates and are shown for branches with bootstrap support of >50%. Selected OTUs from this study are in bold, and numbers in parentheses indicate the number of clones belonging to that OTU from sediments FB064, FB067, and FB066, respectively. Accession numbers of sequences downloaded from GenBank are in parentheses.
