siRNAs are a class of double-stranded RNA molecules that play a role in the RNAi pathway, which interfere with the expression of specific genes by post-transcriptional degradation of mRNAs that contain complementary sequences. siRNA can be used as a tool for studying single gene function in vivo and in vitro, and siRNA has attracted attention as a potential therapeutic agent due to its ability to inhibit specific genes in many diseases.

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