Recombinant Human Moesin GST (N-Term) Protein

A: The reason for a low MOI is most likely because RNAi is a very strong and efficient technique. Wikipedia does a good job of explaining RNA interference. However, I would imagine that in a cell, there will be at most 1-2 copies of the gene mRNA present at any given time, unless you're dealing with a highly expressed protein such as Actin, where I would imagine silencing Actin would be lethal to the cell. I can imagine a few reasons to not use too much siRNA. First, it is expensive, so you don't want to waste it. Second, using too much would cause there to be a lot of non-translatable RNA present in the cell, which could trigger an immune response, as the presence of uncapped RNAs can indicate presence of a virus and one of the TLRs may respond to this.