Combining with incidental electromagnetic radiation, particularly visible light, and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex. [GOC:bf, GOC:dph, ISBN:0198506732]
Full description or abstract
Collection
M5: Ontology GO: Gene Ontology GO:MF: GO Molecular Function
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