Oligomer compositions comprising first and second oligomers are provided wherein at least a portion of the first oligomer is capable of hybridizing with at least a portion of the second oligomer, at least a portion of the first oligomer is complementary to and capble of hybridizing to a selected target nucleic acid, and at least one of the first or second oligomers has a modified base for binding to an adenine or guanine base in the opposite strand. Oligonucleotide/protein compositions are also provided comprising an oligomer complementary to and capable of hybridizing to a selected target nucleic acid and at least one protein comprising at least a portion of an RNA-induced silencing complex (RISC), wherein the oligomer has a modified base for binding to an adenine or guanine base in the opposite strand.
提供了包含第一和第二寡聚体的寡聚体组合物,其中第一寡聚体的至少一部分能够与第二寡聚体的至少一部分杂交,第一寡聚体的至少一部分与所选靶核酸互补并能够与所选靶核酸杂交,第一或第二寡聚体的至少一种具有修饰碱基,用于与相反链中的
腺嘌呤或
鸟嘌呤碱基结合。还提供了寡核苷酸/蛋白质组合物,该组合物包含与所选靶核酸互补并能与之杂交的寡聚体,以及至少一种包含 RNA 诱导沉默复合体(RISC)至少一部分的蛋白质,其中寡聚体具有与相反链中
腺嘌呤或
鸟嘌呤碱基结合的修饰碱基。