SAN FRANCISCO, 11 (UPI) -- U.S. scientists have reported a significant improvement in the technique for genetically reprogramming mouse cells to their embryonic state.The technique developed by University of California-San Francisco researchers builds on previous research last year by Dr. Shinya Yamanaka and then confirmed this spring by Yamanaka’s team and, in independent studies, by scientists at the Massachusetts Institute of Technology, Harvard and UCLA.
