Ready-to-use ELISA kits are available for the detection of zona pellucida sperm-binding protein 3, an alias of the protein, zona pellucida glycoprotein 3. The official gene symbol is ZP3. The protein, with a mass of 47 kDa and length of 424 residues, is reported to be membrane-associated and secreted. It is a member of the ZP domain family, ZPC subfamily and may be known by other names, including: OOMD3, zona pellucida protein C, zona pellucida glycoprotein 3B, sperm receptor, ZP3A/ZP3B, and zona pellucida sperm-binding protein 3, and ZP3B.