Mouse Embryonic Stem Cells - The generation of unlimited numbers of dopamine neurons from mouse embryonic stem cells can be achieved in a multi-step differentiation protocol, allowing the sequential generation of embryonic stem cells, embryoid bodies, early ectodermal cells, proliferating CNS precursors, and differentiated neurons and glia. Human Embryonic Stem Cells - We have developed protocols for the efficient generation of neural progeny from various human ES cell lines.