Isberg, Ralph R., Ph.D., Assistant Investigator 73 
Tufts University School of Medicine, Boston 
Factors That Promote Host Cell Entry and Growth of Intracellular Bacteria 
Kaback, H. Ronald, M.D., Investigator 75 
University of California, Los Angeles 
Functional Interactions Between Intramembrane Charged Residues in the Lactose 
Permease o/ Escherichia coli 
Kim, Peter S., Ph.D., Assistant Investigator 77 
Massachusetts Institute of Technology 
Protein Folding and Macromolecular Recognition 
Kirkegaard, Karla A., Ph.D., Assistant Investigator 79 
University of Colorado at Boulder 
Genetics and Biochemistry of RNA Viruses 
Kobilka, Brian K., M.D., Assistant Investigator 81 
Stanford University School of Medicine 
Molecular Basis of Adrenergic Receptor Function 
Lai, Michael M.-C, M.D., Ph.D., Investigator 83 
University of Southern California School of Medicine, Los Angeles 
Replication and Pathogenesis of RNA Viruses 
Lamb, Robert A., Ph.D., Sc.D., Investigator 85 
Northwestern University, Evanston 
Structure and Replication of Influenza Virus and Paramyxoviruses 
Lefkowitz, Robert J., M.D., Investigator 86 
Duke University Medical Center 
Adrenergic Receptors 
Lehmann, Ruth, Ph.D., Assistant Investigator 89 
Massachusetts Institute of Technology 
Pattern Formation and Germ Cell Determination in the Drosophila Embryo 
Maas, Richard L., M.D., Ph.D., Assistant Investigator 91 
Brigham and Women's Hospital, Boston 
Molecular Mechanisms of Embryonic Induction 
Mailer, James L., Ph.D., Investigator 92 
University of Colorado School of Medicine, Denver 
Cell Cycle-regulated Protein Kinases 
Massague, Joan, Ph.D., Investigator 94 
Memorial Sloan-Kettering Cancer Center, New York City 
Control of Cell Growth and Differentiation by Transforming Growth Factor-^ 
McKnight, Steven L., Ph.D., Investigator 95 
The Carnegie Institution of Washington, Baltimore 
Transcriptional Regulatory Proteins 
Nusse, Roeland, Ph.D., Associate Investigator 97 
Stanford University School of Medicine 
Cellular Interactions in Embryogenesis 
O'Donnell, Michael E., Ph.D., Assistant Investigator 98 
Cornell University Medical College, New York City 
Mechanism of DNA Replication 
CELL BIOLOGY AND REGULATION 3 
