Figure 7.

Gag alone can promote intracellular VLPs formation. Gag was detected by immunogold labeling in lowicryl embedded sections of Fly packaging cells which expressed the Gag and Pol proteins only. A) Extracellular VLP (arrow) released from the plasma membrane (arrowhead) labeled with 5 nm gold particles. B) VLPs (arrows) present in intracellular vacuole (arrowhead).