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Morillon R, Chrispeels MJ.Morillon R, et al. Among authors: chrispeels mj.Proc Natl Acad Sci U S A. 2001 Nov 20;98(24):14138-43. doi: 10.1073/pnas.231471998. Epub 2001 Nov 13.Proc Natl Acad Sci U S A. 2001.PMID: 11707572Free PMC article.