2Y0S:
reference: Archaeal RNA polymerase: the influence of the protruding stalk in crystal packing and preliminary biophysical analysis of the Rpo13 subunit., Wojtas M, Peralta B, Ondiviela M, Mogni M, Bell SD, Abrescia NG, Biochem Soc Trans. 2011 Jan 19;39(1):25-30. PMID: 21265742

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