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.
Schematic illustration of the possible feed-back circulation of the information in a triangular trimeric RM. It should be noticed that all receptors have two sites allowing RRIs, hence the flow of the information. For further details, see text.
