Small strands of RNA that stifle protein synthesis are one of the hottest topics in molecular biology because they might be able to stem cancer and other diseases. Researchers looking for information on one type of obstructionist RNA, called microRNA (miRNA), should check out the miRNA Registry from the Sanger Institute in Hinxton, U.K. The site tallies sequence data on more than 700 miRNAs from eight species, including humans. You can also locate the original literature description and similar miRNAs. To help the field keep miRNA nomenclature straight, researchers can deposit a newly discovered sequence, and the curators will name it.