RNA interference (RNAi)

RNA interference (RNAi) is an important pathway that is
used in many different organisms to regulate gene expression. This animation
introduces the principles of RNAi involving small interfering RNAs (siRNAs) and
microRNAs (miRNAs). We take you on an audio-visual journey through the steps of
gene expression and show you an up-to-date view of how RNAi can silence specific
mRNAs in the cytoplasm.

http://www.nature.com/nrg/multimedia/rnai/animation/index.html