JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY
Stem cell research. Technician using a light microscope to carry out nuclear transfer on a mouse egg (at upper centre on the monitor). Its genetic material has been removed and an adult cell nucleus is being injected in its place with a needle. The resulting embryo will consist of embryonic stem cells, the cell precursors from which all the body's specialized cells develop. Stem cells made from the cell nucleus of a patient could be used for therapeutic cloning, the creation of personalized tissues to replace diseased or damaged body parts. Photographed at the Centre for Genome Research, Edinburgh University, Scotland.
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