the addition of cytochalasin b ( 7.5 % micrograms/ml ) to the medium for 1 h after electrofusion significantly improved the development to morula-blastocyst stage of reconstituted embryos derived from both 16-cell blastomeres ( 11 % vs. 35 % ) and icm cells ( 0 % vs. 56 % ) , indicating that the cytoskeletal mechanisms operating at the time of oocyte activation may affect the developmental potential of exogenous nuclei .
C0007634
cells
C0007610
nuclei