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.
Number of 16S rRNA gene copies from archaea as determined by real-time PCR. (A) Comparison between the two winter samples (n = 8 each). (B) Comparison between the winter and summer samples (winter, n = 16; summer, n = 8). The error bars represent the standard deviation.
