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Pappenheimer, A. M. (Alwin Max), 1908-1995 and University of Pennsylvania. School of Medicine
Date:
31 October 1940
Description:
In this exchange of letters Heidelberger and Pappenheimer discussed hypotheses and evidence regarding the location of the sites at which antibody molecules (later shown to be Y-shaped) bind to antigens. One hypothesis, proposed by the preeminent physical chemist Linus Pauling and discussed in this letter, held that these binding sites were located at the ends of a symmetrical molecule.