原文是all 12 hESC lines derived from such arrested embryos have been1 _6 s" V# _$ ~9 l( g; u
shown to be karyotypically normal and their pluripotency- @- G: A5 S# X, R/ C9 {1 f# ^: Z
and differentiation potential has been demonstrated both in7 N& {; V* A* O- i2 j, Z8 n
vitro and in vivo.