JV18; JV18-1; MGC22139; MGC34440; hMAD-2; hSMAD2; Mad protein homolog; MAD, mothers against decapentaplegic homolog 2; Mad-related protein 2; Mother against DPP homolog 2; SMAD family member 2; SMAD, mothers against DPP homolog 2; Mad, mothers against decapentaplegic homolog 2;