Breakthrough of the year. Small RNAs make big splash.

Animals Chromatin/chemistry,physiology DNA Transposable Elements Endoribonucleases/metabolism Gene Expression Regulation Gene Silencing Heterochromatin/metabolism MicroRNAs/physiology Plants/genetics RNA Interference RNA, Double-Stranded/physiology RNA, Fungal/physiology RNA, Protozoan/physiology RNA, Small Interfering/physiology Ribonuclease III Schizosaccharomyces/genetics Second Messenger Systems Tetrahymena/genetics

Chromatin DNA Transposable Elements Heterochromatin MicroRNAs RNA, Double-Stranded RNA, Fungal RNA, Protozoan RNA, Small Interfering Endoribonucleases Ribonuclease III