Multisubunit RNA polymerases melt only a single DNA base pair downstream of the active site.

Kashkina E, Anikin M, Brueckner F, Lehmann E, Kochetkov SN, McAllister WT, Cramer P, Temiakov D. Multisubunit RNA polymerases melt only a single DNA base pair downstream of the active site. J Biol Chem. 2007 Jul 27; 282(30):21578-82.

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