Single-Stranded Filamentous DNA Bacteriophages M13, fl and fd Distinct Properties of M13 -Infect Escherichia coli Infect only male cells through attachment to the male-specific pilus Have circular single-stranded DNA Can be used as a cloning vector and DNA sequencing vehicle in genetic engineering Infect but not kill the cells
第一节植物体内同化物的运输系统 Section1 Transport System of Assimilates in Plants 第二节 同化物运输的形式、方向和速率 Section2 Form,direction and Rate of Assimilate Transport 第三节 同化物的运输机理 Section3 Transport Mechanism of Assimilate