Contents 
243 Genetic Studies in Cardiovascular Disease 
Jean-Marc Lalouel, M.D., D.Sc. 
245 Structure and Replication of Influenza Virus and Paramyxoviruses 
Robert A. Lamb, Ph.D., Sc.D. 
2?7 Cancer and Genetic Modification 
Philip Leder, M.D. 
249 From Molecular Biology to Therapy of Human Disease 
Fred D. Ledley, M.D. 
251 Molecular Biology of Hormone and Drug Receptors in Health 
and Disease 
Robert J. Lefkowitz, M.D. 
253 Axis Formation and Germline Determination in Drosophila 
Ruth Lehmann, Ph.D. 
255 Regulation of Gene Expression During Cellular Differentiation 
and Activation 
Jeffrey M. Leiden, M.D., Ph.D. 
257 Chemical Communication 
Michael R. Lerner, M.D., Ph.D. 
259 Structural Determinants of Human a-Globin Gene Expression 
Stephen A. Liebhaber, M.D. 
261 The Heat-Shock Response 
Susan L. Lindquist, Ph.D. 
263 T Cell Surface Glycoproteins in Development and Viral Infections 
Dan R. Littman, M.D., Ph.D. 
265 The Biology of T Lymphocyte Development 
Dennis Y.-D. Loh, M.D. 
267 Molecular Genetics of Mammalian Glycosyltransferases 
John B. Lowe, M.D. 
269 Mechanisms of Embryonic Induction in Vertebrates 
Richard L. Maas, M.D., Ph.D. 
271 Cell Cycle Control 
James L. Mailer, Ph.D. 
273 The Role of T Cells in Health and Sickness 
Philippa Marrack, Ph.D. 
275 Cell Regulation by Transforming Growth Factors 
Joan Massague, Ph.D. 
