Immunogen sequence: RLLDFSYEQY QKALRQSAGA VVIILPRAMA AVPQDVVRQF MEIEPEMLAM ETAVPVYFAV EDEALLSIYK QTQAASASQG SASAAEVLLR TATANGFQMV TSGVQSKAVS DWLIASVE. May antagonize Nodal signaling and subsequent organization of axial structures during mesodermal patter