The present invention pertains to: a method for modifying a nucleic acid contained in a sample, said method including a step for bringing the sample into contact with a nucleic acid-modifying agent in the presence of an acidic polysaccharide and/or a nucleotide; and a method for selectively detecting a nucleic acid derived from living cells contained in the sample, said method including the following steps: (a) a step for modifying a nucleic acid contained in a sample according to the method for modifying a nucleic acid contained in a sample, which includes a step for bringing the sample into contact with a nucleic acid-modifying agent in the presence of an acidic polysaccharide and/or a nucleotide; and (b) a step for selectively detecting an unmodified nucleic acid from the sample after step (a). The present invention further pertains to a kit and composition for use in these methods.
本发明涉及:一种修饰样品中所含核酸的方法,所述方法包括在酸性
多糖和/或核苷酸存在的情况下,使样品与核酸修饰剂接触的步骤;以及一种选择性检测样品中所含活细胞衍生核酸的方法,所述方法包括以下步骤:(a) 根据修饰样品中所含核酸的方法,修饰样品中所含核酸的步骤,包括在酸性
多糖和/或核苷酸存在的情况下,使样品与核酸修饰剂接触的步骤;以及 (b) 在步骤(a)之后,选择性检测样品中未修饰核酸的步骤。本发明还涉及用于这些方法的试剂盒和组合物。