The term zona pellucida is identified in base64 scheme by the sequence em9uYSBwZWxsdWNpZGE=, while the MD5 signature is equal to 2d47e1b87e59c1f0b63babdd5034411c. The ASCII encoding of zona pellucida in hexadecimal notation is 7a6f6e612070656c6c7563696461.