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Prokaryotic RNA polymerases are essential enzymes responsible for the transcription of genetic information from DNA into RNA, a crucial step in gene expression. Unlike eukaryotic systems, prokaryotes, such as bacteria, have a simpler transcription machinery but display remarkable efficiency and regulation. The RNA polymerase in prokaryotes is a multi-subunit enzyme complex that catalyzes the synthesis of RNA using DNA as a template, initiating at specific sequences called promoters. Understanding its structure, function, and regulation is vital for appreciating how prokaryotic cells control gene expression and respond to environmental cues. The core RNA polymerase in prokaryotes consists of five subunits: two alpha (α) subunits, one beta (β) subunit, one beta-prime (β′) subunit, and one omega (ω) subunit. The α subunits play a role in enzyme assembly and interact with regulatory proteins to facilitate transcription activation. The β _____ _____ ___ __________ _____ ____.
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