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Meredith GD, Chang WH, Li Y, Bushnell DA, Darst SA, Kornberg RD.Meredith GD, et al.J Mol Biol. 1996 May 10;258(3):413-9. doi: 10.1006/jmbi.1996.0258.J Mol Biol. 1996.PMID: 8642599Free article.