egg coat https://github.com/geneontology/go-ontology/issues/31720 GO:0035805 cellular_component zona pellucida bf A specialized extracellular matrix that surrounds the plasma membrane of the ovum of animals. The egg coat provides structural support and can play an essential role in oogenesis, fertilization and early development. vitelline membrane 2011-04-19T02:07:23Z specialized extracellular matrix