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The mammalian heart has a remarkable regenerative capacity for a short period of time after birth, after which the majority of cardiomyocytes permanently exit cell cycle. We sought to determine the primary postnatal event that results in cardiomyocyte cell-cycle arrest. We hypothesized that transition to the oxygen-rich postnatal environment is the upstream signal that results in cell-cycle arrest...
Expanded triplet repeat sequences are known to cause at least 16 inherited neuromuscular diseases. In addition to short-length changes, expanded triplet repeat tracts frequently undergo large changes, often amounting to hundreds of base-pairs. Such changes might occur when template or primer slipping creates insertion/deletion loops (IDLs), which are normally repaired by the mismatch repair system...
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