原文是all 12 hESC lines derived from such arrested embryos have been+ A4 _8 O a9 @+ u! x
shown to be karyotypically normal and their pluripotency9 U! A K0 y$ w1 t
and differentiation potential has been demonstrated both in* h' R$ X# R( M+ V+ G: N" \; Y
vitro and in vivo.