TGF-β信号家族在生物体生命活动中具有多种发育和生理功能。研究该信号家族在生物体内的表达模式具有重要的意义。gbb是TGF-β信号成员bmp7的果蝇同源基因,为了进一步研究gbb对胚胎发育的影响，本文采用DNA免疫技术制备得到果蝇GBB多克隆抗体。首先提取果蝇总RNA，反转录得到cDNA文库,以该文库为模板克隆出gbb基因编码区序列，构建成真核表达质粒pCAGGSP7/gbb。采用DNA免疫技术免疫BALB/c小鼠，取心血分离血清制备了GBB多克隆抗体。免疫印迹试验表明制备的GBB多克隆抗体有效,果蝇胚胎免疫荧光分析表明GBB在果蝇胚胎发育0~9 h无明显表达，9 h之后开始高效表达。

The TGF-β signaling plays multiple developmental and physiological functions in life. It is important to study the expression pattern of this signal family in vivo. gbb is a homolog gene of bmp7 in Drosophila. In order to study the effect of TGF-β signaling on embryonic development, a polyclonal antibody against Drosophila GBB was prepared. The cDNA sequence of the gbb was cloned (from the library) by cDNA library of Drosophila, and the eukaryotic expression plasmid pCAGGSP7/gbb was constructed. The BALB/c mice were immunized with DNA immunoassay, and the polyclonal antibody against GBB was prepared by taking serum. The antibody was found to be effective by WB. Through immunofluorescence of Drosophila embryos, it was shown that GBB has no obvious expression at 0~9 h, however, highly expressed signal may be seen after 9 h.