GENETICS 
Barsh, Gregory S., M.D., Ph.D., Assistant Investigator 149 
Stanford University School of Medicine 
Mammalian Developmental Genetics 
Beachy, Philip A., Ph.D., Assistant Investigator 150 
The Johns Hopkins University School of Medicine 
Genetic Control of Segmental Differentiation 
Beaudet, Arthur L., M.D., Investigator 152 
Baylor College of Medicine 
Molecular Studies of Human Genetic Diseases 
Bell, Graeme I., Ph.D., Investigator 154 
The University of Chicago 
Molecular Genetics of Diabetes Mellitus 
Bellen, Hugo J., D.V.M., Ph.D., Assistant Investigator 157 
Baylor College of Medicine 
Differentiation of the Drosophila Nervous System 
Belmont, John W., M.D., Ph.D., Assistant Investigator 158 
Baylor College of Medicine 
Hematolymphoid Precursor Development 
Brown, Patrick O., M.D., Ph.D., Assistant Investigator 160 
Stanford University School of Medicine 
Retroviral Replication and New Methods for Gene Mapping 
Capecchi, Mario R., Ph.D., Investigator 162 
University of Utah School of Medicine 
Targeted Mutations in Embryonic Stem Cells: A Molecular Genetic Dissection 
of Development 
Caskey, C. Thomas, M.D., Investigator 164 
Baylor College of Medicine 
Medical Genetics and Models of Mutation and Therapy 
Cech, Thomas R., Ph.D., Investigator 167 
University of Colorado at Boulder 
RNA Catalysis and the Structure of Chromosome Ends 
Church, George M., Ph.D., Assistant Investigator 169 
Harvard Medical School 
Genomic Sequence Comparisons 
Cohen, Stephen M., Ph.D., Assistant Investigator 171 
Baylor College of Medicine 
Molecular Genetics of Limb Development in Drosophila 
Collins, Francis S., M.D., Ph.D., Investigator 172 
University of Michigan Medical School 
Molecular Genetics of Human Disease 
Corden, Jeffry L., Ph.D., Associate Investigator 175 
The Johns Hopkins University School of Medicine 
Molecular Analysis of RNA Polymerase II 
GENETICS 129 
