G proteins. The target sets the tempo.
Bourne
H R
HR
Stryer
L
L
D000818:Animals; D019204:GTP-Binding Proteins / Q000502:physiology*; D020690:GTPase-Activating Proteins; D006153:Guanosine Diphosphate / Q000378:metabolism; D006160:Guanosine Triphosphate / Q000378:metabolism; D008954:Models, Biological; D011506:Proteins / Q000378:metabolism; D011956:Receptors, Cell Surface / Q000502:physiology; D015398:Signal Transduction
D020690:GTPase-Activating Proteins; D011506:Proteins; D011956:Receptors, Cell Surface; D006153:Guanosine Diphosphate; D006160:Guanosine Triphosphate; D019204:GTP-Binding Proteins