Cells keep a memory of their tissue origin

Salamanders, Ambystoma mexicanum, re-growing amputated limbs do so by producing tissue-specific progenitor cells. The finding, reported in a paper titled 'Cells keep a memory of their tissue origin during axolotl limb regeneration' in the most recent issue of Nature (2 July), challenges dogma and has important implications for our understanding of limb regeneration...

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