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Balasubramaniam S, Goldstein JL, Brown MS.Balasubramaniam S, et al. Among authors: goldstein jl.Proc Natl Acad Sci U S A. 1977 Apr;74(4):1421-5. doi: 10.1073/pnas.74.4.1421.Proc Natl Acad Sci U S A. 1977.PMID: 16260Free PMC article.