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Regulation of Gene Expression, 基因表現的調節in Eukaryotes, 基因表現的調節in Bacteria,…
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基因表現的調節in Bacteria
lac operon(in bacteria)
Lac repressor: lacI
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也會接在O₂ or O₃上
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it reduces transcription, but transcription occurs at a low, basal rate, even the repressor bound
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structure
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operon: a custer of genes 共享a promoter and regulatory sequences(← activator&repressor binding site )
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motifs
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形式
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leucine zipper(拉鍊)
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DNA-binding domain 有鹼基(Lys, Arg)去與polyanionic DNA作用
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