Immunogen sequence: QHREPSEQEH RRARNSDRDR HRGHSHQRRT SNERPGSGQG QGRDRDTQNL QAQEEEREFY NARRREHRQR NDVGGG Highest antigen sequence identity to the following orthologs: Mouse - 78%, Rat - 76%. Smad-binding peptide aptamers can be developed to selectively in