The invention relates to an aggregate comprising metallic nanoparticles and nucleic acid molecules wherein each metallic nanoparticle is coated with a polycation. The invention also relates to the a method for obtaining the aggregate of the invention and to the use of said aggregate in methods for detecting the presence of a nucleic acid in a sample, in methods for detecting the presence of a given nucleotide at a predetermined position in a target nucleic acid, in methods for detecting the presence of a modified nucleotide at a predetermined position in a target nucleic acid, methods for detecting the presence of a conjugate between a double stranded nucleic acid and a chemical in a sample comprising double stranded nucleic acid molecules, in methods for determining the content of modified nucleotides in a target nucleic acid and in method for determining the content of modified nucleotides in a target nucleic acid.
本发明涉及一种由
金属纳米颗粒和核酸分子组成的聚合体,其中每个
金属纳米颗粒都涂有聚阳离子。本发明还涉及获得本发明聚合体的方法,以及将所述聚合体用于检测样品中是否存在核酸的方法、用于检测目标核酸中预定位置是否存在给定核苷酸的方法、用于检测目标核酸中预定位置是否存在修饰核苷酸的方法、检测包含双链核酸分子的样品中是否存在双链核酸与
化学品之间的共轭物的方法、确定靶核酸中修饰核苷酸含量的方法和确定靶核酸中修饰核苷酸含量的方法。