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MicroRNAs (miRNAs) are endogenous noncoding small RNAs with important roles in many biological pathways; their generation and activity are under precise regulation. Emerging evidence suggests that miRNA pathways are precisely modulated with controls at the level of transcription, processing, and sta...
ORGANISM(S): Drosophila melanogaster 
Small interfering RNAs (siRNAs) direct RNA interference (RNAi) in eukaryotes. In flies, somatic cells produce siRNAs from exogenous double-stranded RNA as a defense against viral infection. Here, we identify 21-nt long, endogenous siRNAs (endo-siRNAs) corresponding to transposons and heterochromatic...
ORGANISM(S): Drosophila melanogaster 
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