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"Elucidating the mechanism of transcription initiation by RNA polymerases (RNAP) is essential for understanding gene transcription and regulation. Although several models such as DNA scrunching, RNAP translation, and RNAP rotation have been proposed, the mechanism of initiation by T7 RNAP has remained unclear."[1]
"In addition to DNA scrunching, FRET studies also indicated moderate rotation or hinging movement of the promoter during the synthesis of 4 to 7 nt RNA." [1]


References

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  1. ^ a b Tang, Guo-Qing; Roy, Rahul; Ha, Taekjip; Patel, Smita S. (NaN undefined NaN). "Transcription Initiation in a Single-Subunit RNA Polymerase Proceeds through DNA Scrunching and Rotation of the N-Terminal Subdomains". Molecular Cell. 30 (5): 567–577. doi:10.1016/j.molcel.2008.04.003. PMC 2459238. PMID 18538655. {{cite journal}}: Check date values in: |date= (help)