Table 2. The combination of first and serial nuclear transfer results.

Species	Donor tissue	Donor stage	% of total nuclear transfers reaching muscular response stage	Ref.
X. laevis	Intestinal epithelium	Early feeding tadpole stage 47	20	4
X. laevis	Skin outgrowth	Adult	11-12	14
X. laevis	Kidney, lung, heart	Adult	13	47