Contents 
29 Homeotic Gene Action in Drosophila 
Philip A. Beachy, Ph.D. 
31 Molecular Studies of Human Genetic Disease 
Arthur L. Beaudet, M.D. 
33 Molecular Genetics of Diabetes Mellitus 
Graeme I. Bell, Ph.D. 
35 Development of the Drosophila Peripheral Nervous System 
Hugo J. Bellen, D.V.M., Ph.D. 
37 Genetic Manipulation of Hematopoietic Stem Cells 
John W. Belmont, M.D., Ph.D. 
39 Proteins of the Spectrin-based Membrane Skeleton 
G. Vann Bennett, M.D., Ph.D. 
41 TNF and the Molecular Pathogenesis of Shock 
Bruce A. Beutler, M.D. 
43 T Lymphocyte Ontogeny and Specificity 
Michael J. Bevan, Ph.D. 
45 Structural Studies of Molecules Involved in the Immune Recognition of 
Infected Cells 
Pamela J. Bjorkman, Ph.D. 
4 7 Molecular Mechanisms of Insulin and Polypeptide Hormone Action 
Perry J. Blackshear, M.D., D.Phil. 
49 Intracellular Protein Traffic and Nuclear Organelles 
Giinter Blobel, M.D., Ph.D. 
51 Immunity and Pathogenesis of Third World Diseases: Leprosy 
and Tuberculosis 
Barry R. Bloom, Ph.D. 
53 Molecular Biology of the Extracellular Matrix 
Jeffrey F. Bonadio, M.D. 
55 Lymphocyte Differentiation and Activation 
Alfred L. M. Bothwell, Ph.D. 
57 Functional Heterogeneity in CD4-bearing T Lymphocytes 
H. Kim Bottomly, Ph.D. 
61 Retroviral Replication and Human Gene Mapping 
Patrick O. Brown, M.D., Ph.D. 
63 Normal and Oncogenic Forms of the src Gene Product 
Joan S. Brugge, Ph.D. 
