Immunogen sequence: LWVAERGTTQ GCHPAWEPRS ESQASRKEEG LPEEEPSHVT GREGFPTDAP YPTTLGKDRE CQSQSLALKE QNN Highest antigen sequence identity to the following orthologs: Mouse - 41%, Rat - 37%. Transcriptional repressor. May modulate BMP and TGF-beta signal tra