5FJA:
reference: Molecular structures of unbound and transcribing RNA polymerase III., Hoffmann NA, Jakobi AJ, Moreno-Morcillo M, Glatt S, Kosinski J, Hagen WJ, Sachse C, Muller CW, Nature. 2015 Nov 25. doi: 10.1038/nature16143. PMID: 26605533

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