The term immunoglobulin a is identified in base64 scheme by the sequence aW1tdW5vZ2xvYnVsaW4gYQ==, while the MD5 signature is equal to d1f11e164f5afc752b1e8997d60f761d. The ASCII encoding of immunoglobulin a in hexadecimal notation is 696d6d756e6f676c6f62756c696e2061.