Regulators of G protein signaling are protein structural domains or the proteins that contain these domains, that function to activate the GTPase activity of heterotrimeric G-protein α-subunits.
Structure of active conformation of Gi-alpha1
Pheromone
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A pheromone is a chemical that is secreted or excreted by an organism, which triggers a social response in members of the same species. There are alarm pheromones, food trail pheromones, sex pheromone
A fanning honeybee exposes Nasonov's gland (white – at tip of abdomen) releasing pheromone to entice swarm into an empty hive
Aggregation of bug nymphs
Aggregation of the water springtail Podura aquatica
Dogs communicate using pheromones and olfactory signals in urine.