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.
Higher level regulatory mechanisms of GEFs: Positive feedback loops of Rac/RasGEF SOS and Cytohesin3, regulation of Vav1 by the PH-DH module, and regulation of EPAC2 by the second messenger. The right panels show models for each regulatory mechanism.
