stranded origin, the latter are 1:1 interactions. No interactions were noticed upon mixing oligonucleotide analogues of different sense of chirality. Modified mixed trans-3-HO A,T sequences display no hybridisation with complementary nucleic acids, nor homocomplex formation. The l-cis all-adenine oligonucleotide hybridises with its RNA complement. Several complexes were investigated by circular dichroism
完全修饰的寡核苷酸是从3-合成ø的三苯甲基-phosphoramidites反式-3-羟基- ñ [(N - 6 -benzoyladenin -9-基) -乙酰基] -prolinol [(2-小号,3 - [R )和(2 - [R,3 S)系列],反-3-羟基-N -[(胸腺
嘧啶-1-基)-乙酰基]-脯
氨醇[(2 S,3 R)和(2 R,3 S)系列]和(2 R,3 R)。值得注意的是,l- trans(2 R,3 S)和d-反式(2 S,3 R)全
腺嘌呤寡核苷酸能够与互补的DNA和RNA杂交。用修饰的全胸腺
嘧啶反式寡聚物没有观察到与天然核酸的复合。但是,具有手性相同的两条修饰链之间会形成三链复合物,从而形成复合物。具有反-3-HO- N-乙酰基脯
氨醇主链的全胸腺
嘧啶寡核苷酸能够与d和l系列中相同对映体形式的反-4--HO-N-乙酰基脯
氨醇低聚
腺苷酸杂交,反之,所有-
腺嘌呤寡核苷酸与反