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Why does one not find attenuation as a mechanism of regulating gene expression in eukaryotes?

Why does one not find attenuation as a mechanism of regulating gene expression in eukaryotes?

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Attenuation contains previous stop signals (called as an attenuators). It is a programmed mechanism for stopping transcription is prokaryotic operons. especially, in bacterial operon system. In eukaryotic gene expression (transcription) the termination process of transcription is mediated by RNA polymerase dependent activity. At the termination formation of hairpin like structure will stops the process. In another mechanism addition of poly-AAA tail and addition of Uracil to end (AAAUAA) will stops the activity of RNAP in eukaryotes. Additionally. PolyT tail addition produced stop signal for RNA pol III.

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