Abstract
The green fluorescence of bioluminescent jellyfishAequorea victoria is due to the presence of the green fluorescent protein (GFP). To examine whether the GFP gene can be applied as a reporter gene in insect cells, a baculovirus transfer vector containing the neomycin resistance gene (neo) was established. The GFP gene was subcloned into the vector downstream of the polyhedrin gene (ocu) promoter. In the presence of G418, the recombinant virus can be purified. Expression of the GFP gene in the recombinant virus should give rise to synthesis of the GFP with a molecular weight of 30×103 dalton, and is observable by the strong green light irradiated by ultraviolet or blue light in viable intact insect cells. The GFP produced in insect cells has typical fluorescent spectra indistinguishable from those of the purified native GFP. The GFP gene as a good reporter gene can be applied to the baculovirus-insect cell expression system.
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