Provided are nucleotide-dye conjugates and related compounds in which a dye is linked to a nucleobase directly or indirectly by an anionic linker. The anionic character of the linker is provided by one or more anionic moieties which are present in the linker, such as phosphate, phosphonate, sulfonate, and carboxylate groups. When the dye is a provided as a donor/acceptor dye pair, the anionic linker can be located between the donor and the acceptor, or between the nucleobase and either the donor or acceptor, or both. In one embodiment, conjugates of the invention provide enhanced electrophoretic mobility characteristics to sequencing fragments, e.g., for dideoxy sequencing using labeled terminators.
提供的是核苷酸
染料共轭物和相关化合物,其中
染料通过阴离子连接剂直接或间接地与核碱基相连。连接剂的阴离子特性由连接剂中存在的一个或多个阴离子基团提供,例如
磷酸盐、
膦酸盐、
磺酸盐和
羧酸盐基团。当
染料作为给体/受体
染料对提供时,阴离子连接剂可以位于给体和受体之间,或位于核碱基和给体或受体之间,或两者之间。在一种实施例中,本发明的共轭物提供了增强的电泳迁移特性,例如使用标记终止子进行二苯基测序的测序片段。