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Nuclear insertions of mitochondrial DNA (mtDNA) segments (NUMTs) represent an evolutionarily conserved phenomenon originating from the ancient endosymbiotic relationship between mitochondria and host cells. These insertions predominantly localize near intergenic or regulatory regions and are often enriched in tissues with high metabolic activity. Once regarded as inert pseudogenes or genomic artifacts, NUMTs are now recognized as dynamic elements capable of modulating nuclear architecture and cellular function.
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