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FELSENFELD G, SANDEEN G, VONHIPPEL PH.FELSENFELD G, et al. Among authors: vonhippel ph.Proc Natl Acad Sci U S A. 1963 Oct;50(4):644-51. doi: 10.1073/pnas.50.4.644.Proc Natl Acad Sci U S A. 1963.PMID: 14077492Free PMC article.No abstract available.