. "ENTITY_REFERENCE_NOTES="^^ . "ENTITY_REFERENCE_ID_DESC=TGF-beta signaling pathway.RNA.RNA.I-SMAD"^^ . "I-SMAD"^^ . "Smad6, Smad7, Dad"^^ . . . . . . . . . . . . . . . . . "I-SMAD"^^ .