Objective To construct the fusion gene of H. pylori neutrophil activating protein (napA) and cholera toxin subunit B (ctxB) and expressed it in E.

• 目的克隆、表达幽门螺杆菌中性粒细胞激活蛋白napA与霍乱毒素B亚单位ctxB融合基因napA-ctxB(nctB)；为制备预防H.