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Experimental approaches to identify non-coding RNAs Huttenhofer A; Vogel JNucleic Acids Res 2006[]; 34 (2): 635-46Cellular RNAs that do not function as messenger RNAs (mRNAs), transfer RNAs (tRNAs) or ribosomal RNAs (rRNAs) comprise a diverse class of molecules that are commonly referred to as non-protein-coding RNAs (ncRNAs). These molecules have been known for quite a while, but their importance was not fully appreciated until recent genome-wide searches discovered thousands of these molecules and their genes in a variety of model organisms. Some of these screens were based on biocomputational prediction of ncRNA candidates within entire genomes of model organisms. Alternatively, direct biochemical isolation of expressed ncRNAs from cells, tissues or entire organisms has been shown to be a powerful approach to identify ncRNAs both at the level of individual molecules and at a global scale. In this review, we will survey several such wet-lab strategies, i.e. direct sequencing of ncRNAs, shotgun cloning of small-sized ncRNAs (cDNA libraries), microarray analysis and genomic SELEX to identify novel ncRNAs, and discuss the advantages and limits of these approaches.|Gene Expression Profiling/methods[MESH]|Gene Library[MESH]|Genomics/methods[MESH]|Oligonucleotide Array Sequence Analysis/methods[MESH]|RNA, Untranslated/*analysis/chemistry/metabolism[MESH]|Sequence Analysis, RNA[MESH] |
