Second, miRNAs are processed from transcripts that can form local RNA hairpin structures, whereas siRNAs are processed from long bimolecular RNA duplexes or extended hairpins.

• 第二，微小RNA由能形成局部RNA 发夹结构的转录体加工而成，而小型干扰RNA 由长链双分子RNA双链体或拓展发夹结构加工而成。