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Credit: Invitations Refused 1963. Source: Wellcome Collection.
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![3. Optokinetic patterns in disorders of erythropoiesis. Speaker: Frederick Stohlman, Jr. Discussors: Clement A. Finch Rudi Schmid Day 2 II. Disorders of Maturation . (Robert F. Schilling, Moderator) 1. The membrane transport of vitamin Speaker: T. Hastings Wilson Discussors: Victor Herbert Bernard A. Cooper 2. The function of vitamin B]_2 and folic acid coenzymes in mammalian cells. Speaker: John M. Buchanan Discussors: H. A. Barker J. C. Rabinowitz 3. Nucleic acid metabolism and unbalanced growth in megaloblastic anemias. Speaker: William S. Beck Discussors: Richard W. Vilter David L. Mallin III. Disorders of Hemoglobin Synthesis . (Thomas Hale Ham, Moderator) Speaker: R. S. Schweet Discussors: Howard Dintzis David W. Allen 2. Globin structure and the hemoglobinopathies. Speaker: Harvey A. Itano Discussors: Vernon M. Ingram Park S. Gerald 3. Studies of hemoglobin synthesis in hypochromic anemias. Speaker: Irving London Discussors: Paul A. Marks John W. Harris We wish to invite you to participate in this program to speak on the topic Theoretical mechanisms for cellular differentiation. Your discussion need not bear directly on the specific topic of erythropoiesis per se. Indeed we would prefer it to be general and even speculative in nature. The object will be to present theoretical mechanisms by which cellular differentiation and functional specificity may be achieved. Such a presentation would -undoubtedly offer a great stimulus to experimentation.](https://iiif.wellcomecollection.org/image/b18188278_PP_CRI_E_2_2_0034.jp2/full/800%2C/0/default.jpg)