Smad1|MADH1|Mothers Against Decapentaplegic Homolog 1|BSP1|BSP-1|hSMAD1|JV4-1SMAD|mothers against DPP homolog 1|Drosophila|MAD homolog 1|Mothers against DPP homolog 1|SMAD family member 1SMAD 1|SMAD|mothers against DPP homolog 1|Smad1|TGF-beta signaling protein 1