Amino Acid Sequence|Animals|Databases, Protein|Egg Proteins|Humans|Information Storage and Retrieval|Membrane Glycoproteins|Molecular Sequence Data|Protein Structure, Tertiary|Receptors, Cell Surface|Sequence Alignment|Sequence Analysis, Protein|Sequence Homology, Amino Acid|Species Specificity|Zona Pellucida|Zona Pellucida Glycoproteins