in only three steps from 5′-O-(4,4′-dimethoxytrityl)thymidine (1). The hybridization properties and enzymatic stability of the oligonucleotide analogues were studied by UV experiments. 17-Mers having one or three modifications in the middle or two modifications in each end hybridized to DNA with moderate lowered affinity compared to unmodified 17-mers (ΔTm 1–3°C per modification). Furthermore, the end-modified
含3'-新颖寡核苷酸类似物Ç -苏式-亚甲基
磷酸二酯使用亚
磷酰胺方法自动化DNA-合成合成的联系。糖修饰的亚
磷酰胺结构单元5是通过对1-(2,3-dideoxy-5- O-(4,4'-dimethoxytrityl)-3 - C-羟甲基-β-D-苏-五
呋喃糖基)胸腺
嘧啶进行
磷酸化而获得的(4),其从5'只有三个步骤合成ø - (4,4'-二甲氧基三苯甲基)
胸苷(1)。通过UV实验研究了寡核苷酸类似物的杂交特性和酶稳定性。17聚体相比未修饰的17聚体(ΔT具有在中间的一个或三个修饰或两个修饰在每个端部与DNA杂交的中度亲和力降低米1-3°每修改C)。此外,末端修饰的和全部修饰的寡核苷酸对蛇毒
磷酸二酯酶是稳定的。