it is concluded ( i ) that shortly after ovulation , and in spite of the presence around the egg of cumulus oophorus and corona radiata cells , significant amounts of oviducal glycoproteins are able to bind firmly to the zona pellucida , and ( ii ) that after contact with spermatozoa there is evidence of a limited hydrolysis of the structure by the sperm protease acrosin .
C0020291
hydrolysis
C0030946
protease