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.
Venn diagram of OTU in the 4 groups. Different colors represent different groups. The number of overlapping part represents the number of OTUs shared by different groups, while the number of non-overlapping parts represents the number of OTUs unique to the corresponding group.
