The invention provides compositions and methods for improved hybridization analysis utilizing DNA, RNA, PNA and chimeric oligomers in which one or more purine bases are substituted by a pyrazolo[5,4-d]pyrimidine or by a 7-deazapurine purine analogue. Reduced self-aggregation and reduced fluorescence quenching are obtained when the oligomers are used in various methods involving hybridization. Methods of synthesis, as well as novel synthetic precursors, are also provided.
                            本发明提供了一种利用DNA、RNA、
PNA和嵌合寡核苷酸进行改进的杂交分析的组合物和方法,其中一个或多个
嘌呤碱基被嘧唑并[5,4-d]
嘧啶或7-脱氧
嘌呤嘌呤类似物所替代。当这些寡核苷酸用于涉及杂交的各种方法时,可以获得减少自身聚集和减少荧光淬灭的效果。本发明还提供了合成方法以及新的合成前体。