Provided is a novel nucleic acid molecule that can inhibit the expression of a gene and can be produces easily and efficiently. The nucleic acid molecule is a single-stranded nucleic acid molecule including an expression inhibitory sequence that inhibits expression of a target gene. The single-stranded nucleic acid molecule includes, in sequence from the 5′ side to the 3′ side: a 5′ side region (Xc); an inner region (Z); and a 3′ side region (Yc). The inner region (Z) is composed of an inner 5′ side region (X) and an inner 3′ side region (Y) that are linked to each other. The 5′ side region (Xc) is complementary to the inner 5′ side region (X). The 3′ side region (Yc) is complementary to the inner 3′ side region (Y). At least one of the inner region (Z), the 5′ side region (Xc), and the 3′ side region (Yc) includes the expression inhibitory sequence. According to this single-stranded nucleic acid molecule, it is possible to inhibit the expression of the target gene.
提供了一种新型的核酸分子,可以抑制
基因表达,并且可以轻松高效地制备。该核酸分子是一种单链核酸分子,包括一个抑制目标
基因表达的表达抑制序列。从5'端到3'端,该单链核酸分子包括:5'端区域(Xc),内部区域(Z)和3'端区域(Yc)。内部区域(Z)由内部5'端区域(X)和内部3'端区域(Y)组成,二者相连。5'端区域(Xc)与内部5'端区域(X)互补。3'端区域(Yc)与内部3'端区域(Y)互补。至少其中之一包括表达抑制序列。通过这种单链核酸分子,可以抑制目标
基因的表达。