II. GENETICS 
Bcachy, FluHp A., Ph.D., Assistant Investigator 153 
The Johns Hopkins University School of Medicine 
Control of Morphogenesis by the Drosophila Homeotic Gene Ultrabithorax 
Beaudet, Arthur L., M.D., Investigator 155 
Baylor College of Medicine 
Molecular Studies of Human Genetic Diseases 
Bell, Graeme I., Ph.D., Associate Investigator 159 
The University of Chicago 
Molecular Biology of Diabetes Mellitus 
Behaont,}ohn^.,M..T>.,Vh..T)., Assistant Investigator 163 
Baylor College of Medicine 
Techniques for Gene Therapy 
Brown, Patricks. 0.,M.T>.,P\\.T>., Assistant Investigator 165 
Stanford University School of Medicine 
Retroviral Integration 
Capecchi, Mario R., Ph.D., Investigator 167 
University of Utah 
Creating Mice with Specific Mutations by Gene Targeting 
Caskey, C. Thomas, M.D., Investigator 169 
Baylor College of Medicine 
Human Genetics and Mutational Models 
Cech, Thomas R., Ph.D., Investigator 173 
University of Colorado at Boulder 
RNA Catalysis and the Structure of Chromosome Ends 
Church, George M., Ph.D., Assistant Investigator 175 
Harvard University consortium: Harvard Medical School 
Genomic Sequencing 
CoUins, Francis S., M.D., Ph.D., Associate Investigator 177 
University of Michigan Medical School 
Molecular Genetics of Human Disease 
Cor den, Je&ry L., Ph.D., Associate Investigator 181 
The Johns Hopkins University School of Medicine 
Molecular Analysis of RNA Polymerase II 
Cullen, Bryan R., Ph.D., Assistant Investigator 183 
Duke University Medical Center 
Trans-Regulation of HIV-1 Gene Expression 
Desiderio, Stephen V., M.D., Ph.D., Assistant Investigator 185 
The Johns Hopkins University School of Medicine 
Molecular Mechanisms in Lymphocyte Development 
Desplasi^CX^udc, Ph.D., Assistant Investigator 189 
The Rockefeller University 
Transcriptional Control in Early Drosophila Development 
Continued 
133 
