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.
The amino-acid sequences of all CH domains were used for the tree construction. For those species that express IgD (and IgW) longer than four CH domains, only the first four CH domains were used in the tree construction. The scale bar represents the genetic distance. The credibility value for each node is shown.
