Su-Chun Zhang, a professor of anatomy and neurology at UW who led the new study, said knowledge of this special gene, called a master regulator, may allow scientists to create a large bank of early brain stem cells, “so you can create any kind of neurons or glial cells in the brain or spinal cord.” For example, the technique could allow scientists to generate large numbers of dopamine-generating neurons to replace those lost in Parkinson?s disease.