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Toczyski DP, Matera AG, Ward DC, Steitz JA.Toczyski DP, et al. Among authors: matera ag.Proc Natl Acad Sci U S A. 1994 Apr 12;91(8):3463-7. doi: 10.1073/pnas.91.8.3463.Proc Natl Acad Sci U S A. 1994.PMID: 8159770Free PMC article.