2、机制Principle andapplicationofRNAiWangChunrongSichuanNormalUniversity.Abstract: RNAinterference (RNA interference, RNAi) isa defensemechanismof evolutionaryconserved against transgenic or alienvirus invasion. The endonuclease (one withRNaseⅢ likeactivityof nuclease, referredtoasDicer.) p