Mary Lou Oster-Granite, Ph.D., joined the MRDD Branch as a Health Scientist Administrator in July 1999. Dr. Oster-Granite received her doctorate in anatomy/neuroanatomy from the Johns Hopkins University and completed a postdoctoral fellowship in developmental neurovirology at the Johns Hopkins University School of Medicine. A long-time grantee of the NIH, and NICHD particularly, Dr. Oster-Granite held faculty positions at the University of Maryland School of Medicine and at Johns Hopkins University School of Medicine and served as a tenured professor of biomedical sciences at the University of California at Riverside before joining the Branch. As a developmental neuroembryologist, neurovirologist, and neurogeneticist, her research interests include genetic models of MRDD, and most recently, animal models of Down syndrome and ornithine carbomyl transcarbamylase deficiency. Her programmatic interests include brain function at a cellular/molecular level, developmental neurobiology, neurochemistry, neurovirology, molecular genetics, and gene therapy. From May 2003 to December, 2005, Dr. Oster-Granite served as acting Branch chief.