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Are mature cells better than stem cells for cloning?

entists are looking for successful substitutes for embryonic stem cells.

Dr Cheng said, "The results clearly show there is no advantage in using adult stem cells over mature fully differentiated cells. We can say with near certainty that a fully differentiated cell such as a granulocyte retains the genetic capacity for becoming like a seed that can give rise to all cell types necessary for the development of an entire organism."

Stem cell expert Dr Stephen Minger, from King's College London, said: "The findings are quite surprising. "Up until this [point], the conventional wisdom was that the less mature a cell, the more likely it is to be reprogrammed. This work suggests the contrary. "Certain types of mature cells could be much easier to reprogramme than expected.

"But of course this has only been done in mice and there could be a big difference when it comes to humans. It would be interesting to see whether the same is found with human cells."
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