1. The follicle cells secrete "'Torso-like "'into the perivitelline space only at the poles. 2. He is also trying another approach, getting follicle cells to make their own VEGF. 3. These dorsal follicle cells are unable to produce the pipe protein required for step two. 4. The second step is a signal from the ventral follicle cells back to the oocyte. 5. The follicle cells change shape and synthetic properties to distinguish the dorsal side from the ventral side. 6. The sperm binds through the corona radiata, a layer of follicle cells on the outside of the secondary oocyte. 7. Because the dorsal follicle cells do not express " pipe, " they are not able to create this complex. 8. In a process that resembled ovulation, said Scholer, the oocytes were released by the follicle cells on day 26. 9. In setting up the compass points of the egg, the microtubules exchange signals with follicle cells that surround the egg. 10. This signal acts after the egg has left the follicle cells so this signal is stored in the perivitelline space.
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