SMAD1 Protein, Human, Recombinant (GST)Transforming Growth Factor-β-Signaling Protein 1, Transforming Growth Factor-Beta-Signaling Protein 1, SMAD1, SMAD Family Member 1, SMAD 1, Mothers Against DPP Homolog 1, Mothers Against Decapentaplegic Homolog 1, Mad-Related Protein 1, MADR1, MADH1, MAD Homolog 1, JV4-1, hSMAD1, BSP-1, BSP1