Acrosome Reaction
© 1997 Chris Patton, Stanford University
The red receptors on the sperm come into contact with the egg jelly, yellow. This induces the acrosome reaction causing the acrosome in green to fuse with the plasma membrane of the sperm. The actin in pink goes from a globular state to a filamentous state pushing the front of the sperm outward exposing the binding receptors, blue. The binding receptors can now bind with the egg