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-   -   siRNA (http://www.molecularstation.com/forum/rna-forum/48055-sirna.html)

j_thomas 01-08-2009 09:41 AM

siRNA
 
Small interfering RNA (siRNA), sometimes known as short interfering RNA or silencing RNA, is a class of 20-25 nucleotide-long double-stranded RNA molecules that play a variety of roles in biology. Most notably, siRNA is involved in the RNA interference (RNAi) pathway, where it interferes with the expression of a specific gene. In addition to their role in the RNAi pathway, siRNAs also act in RNAi-related pathways, e.g., as an antiviral mechanism or in shaping the chromatin structure of a genome; the complexity of these pathways is only now being elucidated.
http://i2.ytimg.com/vi/e2dnFBnFWT8/default.jpg


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