Baculovirus expression system has been used successfully to over-express eukaryotic proteins in insect cells. This system uses a very strong viral promoter, AcNPV polyhedrin, for high level protein expression. Here a Baculovirus expression system was used to express the Mouse G?q protein (mG?q) in SF9 insect cells. The recombinant protein was made at high levels and it was found in the cell membrane where it functions as a signaling molecule.