The present invention relates to unnatural base pairs of Ds (a 5-amino-7-(2-thienyl)-3H-imidazo[4,5-b]pyridine-3-yl group) and a Pa derivative (a 2-nitro-1H-pyrrole-1-yl group bearing a substituent having a π-electron system attached at position 4) that can be replicated with high selectivity/high efficiency, and methods for replicating nucleic acids containing the unnatural base pairs. The present invention also relates to methods for incorporating an unnatural base bearing a functional substituent attached thereto into DNA by a nucleic acid replication reaction. The present invention also relates to methods for replicating and selectively collecting a nucleic acid containing an unnatural base pair from a nucleic acid pool. The present invention also relates to methods for determining a sequence of natural bases in the proximity of an unnatural base in DNA for achieving highly efficient and highly selective replication of a nucleic acid containing the unnatural base.
本发明涉及Ds不自然碱基对(一种含有5-
氨基-7-(2-
噻吩基)-3H-
咪唑[4,5-b]
吡啶-3-基团的化合物)和Pa衍
生物(一种
2-硝基-1H-吡咯烷-1-基团,其在4位带有π电子体系的取代基)的高选择性/高效率复制,以及包含这些不自然碱基对的核酸的复制方法。本发明还涉及通过核酸复制反应将带有功能性取代基的不自然碱基引入DNA的方法。本发明还涉及从核酸池中复制和选择性收集含有不自然碱基对的核酸的方法。本发明还涉及确定DNA中不自然碱基附近自然碱基的序列以实现高效和高选择性复制含有不自然碱基的核酸的方法。