How do Archaea bridge the worlds of Bacteria and Eukaryotes in their gene regulation, making them an evolutionary 'chimera'?

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Archaea have a gene layout and cell structure similar to Bacteria, but their molecular machinery for gene expression (such as RNA polymerase and transcription factors) is more similar to Eukaryotes. This combination allows them to bridge both domains, making them an evolutionary 'chimera.'

Archaea: Bridging Bacterial and Eukaryotic Worlds in Gene Regulation

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