Helicobacter pylori(H.pylori)infection causes peptic and duodenal diseases in humans. Among a 32-protein family of outer......

根据已测定的猪繁殖与呼吸综合征病毒SCQ株序列设计1对引物，应用PCR方法从重组质粒PMD—ORF5扩增得到缺失信号肽序列的基因片段dORF......