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血循环游离DNA是指血循环中具有DNA双螺旋结构的核苷酸片段分子量大小在500 bp~30 000bp之间核苷酸片段。研究表明,循环中的DNA一部分以游离形式存在于血清中,另一部分通过与蛋白质结合成复合体的形式或者附着在血细胞表面存在于血液中[1]。近年来,随着分子生物学技术研究的进
Free circulation of blood refers to the blood circulation DNA double helix structure of the nucleotide fragments of the size of the nucleotide between 500 bp ~ 30 000bp fragment. Studies have shown that part of circulating DNA is present in free form in the serum and the other part is present in the blood by binding to the protein as a complex or attached to the blood cell surface [1]. In recent years, with the progress of molecular biology technology research