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Mukherjee C, Caron MG, Lefkowitz RJ.Mukherjee C, et al. Among authors: caron mg.Proc Natl Acad Sci U S A. 1975 May;72(5):1945-9. doi: 10.1073/pnas.72.5.1945.Proc Natl Acad Sci U S A. 1975.PMID: 1057183Free PMC article.