| Type | MGI:General | Description | cauda epididymal sperm binds to the zona with much greater efficacy than wild-type sperm; 3-fold more sperm remain adherent to the zona after washing than wild-type sperm when sperm are incubated in vitro with eggs, after 3 hours mutant sperm penetrate the zona pellucida only 21% as frequently as wild-type sperm; when the zona-block to polyspermy is heat-inactivated, wild-type sperm continue to penetrated the zona matrix, but mutant sperm are relatively unable to penetrate (efficiency is only ~7% that of wild-type) |
