SMAD2, 3 (Mothers Against Decapentaplegic Homolog 2, MAD Homolog 2, Mothers Against DPP Homolog 2, JV18-1, Mad-related Protein 2, hMAD-2, SMAD Family Member 2, SMAD 2, MADH2, MADR2/Mothers Against Decapentaplegic Homolog 3, MAD Homolog 3, Mad3, Mothers Ag