elper plasmid bom site Mob gene Tra protein from conjugative plasmid mob mRNA Mob protein recipient cell 即mb基因的产物可打开非接合质粒的bom位点(oriT位点), 借助接合质粒tra基因的产物,使非接合质粒被动迁移到受体细 胞中,这种现象称为迁移作用( mobilization)。Tra protein from conjugative plasmid bom site Mob gene mob mRNA Mob protein recipient cell helper plasmid 即mob基因的产物可打开非接合质粒的bom 位点(oriT位点)， 借助接合质粒tra基因的产物，使非接合质粒被动迁移到受体细 胞中，这种现象称为迁移作用(mobilization)