The RNA interference (RNAi) technique has been used to disrupt gene function in a range of model organisms, but its use in mammalian cells has been problematic. RNAi involves the ribonuclease-III-catalysed digestion of specific double-stranded RNA into 21-22 nucleotide small interfering RNA (siRNA) species. In the May 24
Jonathan Weitzman(jonathanweitzman@hotmail.com)