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Maturo JM 3rd, Hollenberg MD.Maturo JM 3rd, et al.Proc Natl Acad Sci U S A. 1978 Jul;75(7):3070-4. doi: 10.1073/pnas.75.7.3070.Proc Natl Acad Sci U S A. 1978.PMID: 277909Free PMC article.