According to the present invention, there is provided a fluorescent nucleotide represented by the formula: A-B-C,
wherein A represents a residue of natural or synthetic nucleotide, oligonucleotide, polynucleotide, or derivative thereof, and binds to B at a base moiety in said residue; B represents a divalent linking group or a single bond; and C represents a monovalent group derived from a fluorescent dye having 0 or 1 sulfonic acid group or phosphoric acid group in a molecule. The present invention provides useful fluorescent nucleotides for labeling nucleic acids, specifically, fluorescent nucleotides of which uptake ratio is high in synthetic reaction of nucleic acids.
根据本发明,提供了一种荧光核苷酸,其表示为公式:A-B-C,其中A代表天然或合成核苷酸、寡核苷酸、多核苷酸或其衍
生物的残基,并在该残基的碱基部分与B结合;B代表二价连接基或单键;C代表源自具有0或1个
磺酸基团或
磷酸基团的荧光
染料分子的一价基团。本发明提供了用于标记核酸的有用荧光核苷酸,特别是在核酸的合成反应中,摄取比例高的荧光核苷酸。