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Wiebauer K, Jiricny J.Wiebauer K, et al.Proc Natl Acad Sci U S A. 1990 Aug;87(15):5842-5. doi: 10.1073/pnas.87.15.5842.Proc Natl Acad Sci U S A. 1990.PMID: 2116008Free PMC article.