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文献和实验several assays for detecting several kinds of DNA damage (strand breaks, internal crosslinking, DNA/protein crosslinks) and repair activity following exposure to genotoxic agents. The methods include single?cell electrophoresis (comet assay), filter eluting, K
,就会产生嘌呤 -4NQO附加体。用紫外线照射则会产生嘧啶二聚体,丝裂霉素 C在状内作用,由于它的媒介,在二条链的鸟嘌呤和鸟嘌呤间形成桥。( 2) DNA链损伤( strand damage)主要为一条链断裂和二条链断裂。如糖的变化,小的损伤对 DNA的复制可完全没有影响,但稍为大一点的变化连连发生,则容易引起变化往往最终导致一条链断裂(例如用 X线照射使水分解产生 OH游离基, OH游离基作用糖,很快就导致一条链断裂)。上述的脱嘌呤也常常导致一条链断裂。当然,磷酸酯键的化学变化也时常导致一条链断裂
The Dynamics of DNA Damage Repair and Transcription
Recent advances have led to several systems to study transcription from defined loci in living cells. It has now become possible to address long-standing questions regarding the interplay between the processes of DNA damage repair
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