Supplementary Fig5-Spint1(right). Copyright: Reprinted with permission from Elsevier from [doi:10.1016/j.ydbio.2007.01.011] Dev Biol 304: 541-55, Sherwood RI; Jitianu C; Cleaver O; Shaywitz DA; Lamenzo JO; Chen AE; Golub TR; Melton DA, Prospective isolation and global gene expression analysis of definitive and visceral endoderm. Copyright 2007