原文是all 12 hESC lines derived from such arrested embryos have been! u+ O% \( ?1 C6 l; H# m2 W
shown to be karyotypically normal and their pluripotency! O$ F, B* I7 M7 @% Q
and differentiation potential has been demonstrated both in( s" M& G" }. \9 i$ y
vitro and in vivo.