Book excerpt: Regulators of G Protein Signaling, Part B continues the in-depth treatment of the topic and covers the RSG protein superfamily including RZ, R4, R7, R12, RhoGEF, and GRK, as well as other heterotrimeric G-protein signaling regulators. - Table of Contents - RZ Subfamily - R4 Subfamily - R7 Subfamily - R12 Subfamily - RhoGEF Subfamily - GRK Subfamily - Other RGS proteins - Activators - Inhibitors - Other Modulators