Generating iPS Cells from MEFS through Forced Expression of Sox-2, Oct-4, c-Myc, and Klf4# M) B9 {* [; c9 s, j, J& Y7 R
G. Grant Welstead, Tobias Brambrink, Rudolf Jaenisch 6 S# h4 A6 ~" o; [% B! qWhitehead Institute for Biomedical Research, Massachusetts Institute of Technology + J, \0 W: h5 m( n! t/ m% M. B* Z1 I* p+ I* x* j6 T6 e