The invention provides nucleic acid monomers with a 2′-modification that are useful for the incorporation of dyes or blocking groups. The monomers can be incorporated on the 3′-end of a dual labeled probe to inhibit PCR polymerase extension during PCR. The polymerase is inhibited from extending the probe at the 3′-hydroxyl group when the monomer is present; there is no need to add a chemical moiety to the 3′-hydroxyl or remove the 3′-hydroxyl. The monomers can also be incorporated internally or at the 5′-end of the oligonucleotide. A detectable label, such as a fluorescent or quenching dye, can be incorporated on the 2′-position of such monomers.
该发明提供了具有2'-修饰的核酸单体,可用于
染料或阻断基团的引入。这些单体可以被合并到双标记探针的3'-末端,以在PCR过程中抑制PCR聚合酶的延伸。当单体存在时,聚合酶被抑制在3'-羟基团上延伸探针;无需向3'-羟基团添加
化学基团或去除3'-羟基团。这些单体也可以在寡核苷酸的内部或5'-末端进行合并。可以在这些单体的2'-位置上合并可检测的标记,如荧光
染料或猝灭
染料。