... such as the worm Caenorhabditis elegan s,theflyDrosophila, and mammals including the human, the mouse and the rat. The totalnumber of miRNAs in multicellular organisms was estimated to represent ... regulators in plants and animals (Bartel,2004; Kim, 2005). Among all the categories of endogenous small RNAs, these tinyRNAs have received the most notice (Sontheimer and Carthew, 2005). They ... The task now is to elucidate the nature and function ofall these new RNAs.This book is a compendium of experimental methods, in silico and the tradi-tional kind, of analyzing the miRNAs. There...