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    環狀DNA研究

      染色体外环状DNA(Extrachromosomal circular DNA, eccDNA)是指存在于常规染色体DNA外的双链环状DNA分子。环状DNA广泛存在于真核生物中,在人的正常组织、癌症组织和体液中均有发现。根据长度大小,可以将环状DNA分为两大类,长度较小(<10kb)的eccDNA与较大的ecDNA(长度≥10kb)。