Peptide sequence: NKGDCGTPSH SRRQPHVMSQ WSRSASRNRR HVTEEADVTV GATDLPGQEW Sequence homology: Cow: 100%; Horse: 100%; Human: 100%; Rabbit: 100%; Rat: 90%. The zona pellucida is an extracellular matrix that surrounds the oocyte and early embryo. It is compo