In vitro development of cloned embryos from different transgenic cell lines.

*fusion rate = No. of fused embryos/No. of couplets.**cleavage rate = No. of cleavage embryos/No. of fused embryos.***blastocyst rate = No. of blastocyst/No. of fused embryos.Four replicate experiments were performed per cells. Numbers in parentheses represent total embryo numbers of four replicates, while other numbers represent development rates (mean±SEM %).a–cWithin a column, values with different superscripts are significantly different from each other (P