Predicted to enable acrosin binding activity. Predicted to be a structural constituent of egg coat. Predicted to be involved in binding activity of sperm to zona pellucida and prevention of polyspermy. Predicted to be active in collagen-containing extracellular matrix and egg coat. Is expressed in ovarian follicle stage I; ovarian follicle stage II; and ovary. Orthologous to human ZP4 (zona pellucida glycoprotein 4).