申请人:GENETICS RESEARCH, LLC
公开号:US11142788B2
公开(公告)日:2021-10-12
The invention provides methods of isolating a target nucleic acid in a sample. A primer is hybridized to the target. A polymerase and modified nucleotide resistant to nuclease degradation are used to extend the primer to create a modified polynucleotide. The sample is exposed to a nuclease, thereby isolating the modified polynucleotide. Optionally, the target nucleic acid may be further protected by binding a protein in a sequence specific manner to one end of the target nucleic acid to create a protected target nucleic acid resistant to nuclease degradation. Thus, after exposing the sample to a nuclease, the modified polynucleotide and protected target nucleic acid are isolated.
本发明提供了在样品中分离目标核酸的方法。引物与目标核酸杂交。使用聚合酶和耐核酸酶降解的修饰核苷酸扩展引物,形成修饰多核苷酸。将样本暴露于核酸酶,从而分离出修饰的多核苷酸。可以选择将蛋白质以序列特异的方式与目标核酸的一端结合,进一步保护目标核酸,以产生抗核酸酶降解的受保护目标核酸。这样,将样品暴露于核酸酶后,就能分离出修饰的多核苷酸和受保护的靶核酸。