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 adaptive immune systems of jawless and jawed vertebrates differ fundamentally in the antigen receptors used and in the mechanisms for receptor diversification. In both lineages, however, common sets of immune related genes in different functional categories facilitate the development and operation of adaptive immunity.
