. . "LEFT_TO_RIGHT"^^ . . "HETERODIMER_ASSOCIATION_LEFT__NEJ-_Co_Smad_phospho_R_Smad-RIGHT__NEJ_MED__phosphoMAD-_re28"^^ . . . . . . . . "true"^^ . "HETERODIMER_ASSOCIATION_LEFT__NEJ-_Co_Smad_phospho_R_Smad-RIGHT__NEJ_MED__phosphoMAD-_re28"^^ .