Wikipedia
Envelysin
Envelysin (, sea-urchin-hatching proteinase, hatching enzyme, chorionase, chorion-digesting proteinase, chymostrypsin, sea urchin embryo hatching enzyme) is an enzyme. This enzyme catalyses the following chemical reaction
Hydrolysis of proteins of the fertilization envelope and dimethylcaseinThis enzyme is a glycoprotein from various members of the class Echinoidea.