Heat-killed Type IS Live mouse Live mouse Living Type R Live mouse Transformation experiment with capsule Live mouse pneumonia Living Type lIS bacteria recovered 肺炎球菌感染小e Living Type lIS 鼠实验 上 Capsul Dead mouse Living Type IIS Heat killed Type lIS bacteria recovered Living Type IR Live mouse Dead mouse
Transformation experiment with pneumonia 肺炎球菌感染小 鼠实验
象加热杀死的SI能使不致 病的RI变成能致病的SI,这种 现象叫转化( transformation) 把SI死菌中能转化RI的物质叫 转化因子
象加热杀死的SIII能使不致 病的RII变成能致病的SIII，这种 现象叫转化（transformation） 把SIII死菌中能转化RII的物质叫 转化因子
Type IR cells 证明转化因子 DNA from 是DNA的实验 heat-killed Is celis DNA from Serum that s,+ heat-killed precipitates lS cells IR cells Type lR cells from mxture lIS colones DNA trom Serum that 的:+,me, Protease→ Iype R cells from moxture lIS coones DNA from Serum that HS cells+ precipitates IIR cells Type R cells trom moxture heat lied precipitates DNase一 HS cells UR cells Type IR cells from mixture No colonies
证明转化因子 是DNA的实验
A diagram of the experiment that demonstrated that dna is the active material in bacterial transformation Enzymes that proteins Type-R and Type-R type-s cells Extraction culture purification Of DNA Add tion of DNA to type-R cultur DNA +some contaminating Type-s cells proten rades DNA pe
A diagram of the experiment that demonstrated that DNA is the active material in bacterial transformation
Transfection experiment with bacteriophage T2 T2噬菌体的侵染实验(T) Protein 650A coat DNA Sheath Protein 1000A DNA Head Collar Core 1000A Sheath Cell wall Base plate Tail Core
Transfection experiment with bacteriophage T2 T2噬菌体的侵染实验(I)