<i>In vitro</i> 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<0.05).