An object of the present invention is to develop and provide a method for efficiently producing a nucleic acid aptamer, particularly, a DNA aptamer, having higher specificity and binding activity against a target substance than those of nucleic acid aptamers obtained by conventional methods. The present invention provides a transcribable or replicable nucleic acid aptamer comprising a natural nucleotide and a non-natural nucleotide having an artificial base-pairable artificial base. The present invention also provides a method for sequencing a non-natural nucleotide-containing single-stranded nucleic acid molecule selected from a single-stranded nucleic acid library.
本发明的目的是开发并提供一种有效生产
核酸适
配体的方法,特别是DNA适
配体,其对目标物质具有比传统方法获得的
核酸适
配体更高的特异性和结合活性。本发明提供了一种可转录或可复制的
核酸适
配体,其包含一种自然
核苷酸和一种非自然
核苷酸,后者具有人工可配对人造碱基。本发明还提供了一种从单链
核酸库中选择的含有非自然
核苷酸的单链
核酸分子的测序方法。