Stem cells lead sheltered lives. A new study of fruit flies shows how stem cell precursors create their own niches where the developing cells can safely hang out. These cell banks give the fly a reserve of stem cells to draw on later to create and replenish organs, make new cells or repair wounds.
A stem cell in the fruit fly gut divides, creating a daughter cell that wraps itself around its mother and siblings and prevents them from turning into specialized tissues, researchers from Columbia University report online January 7 in Science.
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