3 Ew NewA 111 11 Parent Daughter Parent strand strands strand
半保留复制
Messelison-Stahl Experiment DNA extracted and centrifuged to equilibrium in CsCl density gradient Heavy DNA (ISN) Original parent molecule O Hybrid DNA (15N/14N) First-generation daughter molecules Light DNA (l4N) (e) Hybrid DNA daughter molecules
Messelson-Stahl Experiment
desselson-stanl experiment Heavy trent (1) DNA (both strands heavy) (2)占R公 DNA with two light strands ture of and Mixture of heavy and light NA DNA after (4) generation DNA after two (5) generations DNA after three (6) generations Direction of sedimentation
Messelson-Stahl experiment
DNA聚合酶催化的DNA链的合成 deoxynucleoside 5-triphosphate 0=P-O O=P-0 鱼画Q Growing O-P-O DNA strand OH OH OH (primer) Template DNA strand 画画画 5 Deoxyribose 需要模板DNA、底物NIPs、合成方向5”-31
DNA聚合酶催化的DNA链的合成 需要模板DNA、底物dNTPs、合成方向5’→3’
制的和吧 Origin and Direction of DNA Replication
复制的起点和方向 Origin and Direction of DNA Replication