Nucleotide derivatives useful in modified DNA probe synthesis are compounds having the formula (I) wherein either A is a radical of formula -NHCO-(CH₂) x-R³ and B is a substituted pyrimidine or purine residue, or A is a hydrogen atom and B is a radical of formula (II)
The terminal group R³ may comprise amino or carboxy groups, or a sugar moiety, or it may comprise a reporter group such as biotin, or luminol derivatives, or any other group which is detectable by Elisa or other means of detection. These compounds do not exist in natural DNA. The new compounds are useful as active monomers in a rapid and efficient procedure for the synthesis of DNA fragments and can be chemically incorporated in a DNA probe synthesis which allows total control over the extent and site of modification.
在修改的DNA探针合成中有用的核苷酸衍
生物是具有公式(I)的化合物,其中A是公式-NHCO-(CH₂)x-R³的基团,B是取代的
嘧啶或
嘌呤残基,或者A是氢原子,B是公式(II)的基团。末端基团R³可能包括
氨基或羧基,或者糖基团,或者可能包括
生物素或发光衍
生物等报告基团,或者可能包括Elisa或其他检测手段可检测的任何其他基团。这些化合物在自然DNA中不存在。这些新化合物可作为DNA片段合成的活性单体,在快速高效的程序中使用,并可在DNA探针合成中进行
化学合成,从而完全控制修改的程度和位置。