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Howe JA, Mymryk JS, Egan C, Branton PE, Bayley ST.Howe JA, et al. Among authors: branton pe.Proc Natl Acad Sci U S A. 1990 Aug;87(15):5883-7. doi: 10.1073/pnas.87.15.5883.Proc Natl Acad Sci U S A. 1990.PMID: 2143024Free PMC article.