User talk:Gelver.lopez
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Un ARN no codificante (ncRNA) es una molecula de ARN funcional que no se traduce (translated) en una proteina (protein). Con alguna frecuencia son usados como sinonimos: non-protein-coding RNA (npcRNA)(Proteina no codificante), non-messenger RNA (nmRNA)(ARN no Mensajero), small non-messenger RNA (snmRNA)(Pequeño ARN no Mensajero) and functional RNA (fRNA)(ARN funcional). The term small RNA (sRNA) is often used for small bacterial ncRNAs. The DNA sequence from which a non-coding RNA is transcribed as the end product is often called an RNA gene or non-coding RNA gene.
Non-coding RNA genes include highly abundant and functionally important RNAs such as transfer RNA (tRNA) and ribosomal RNA (rRNA), as well as RNAs such as snoRNAs, microRNAs, siRNAs and piRNAs and the long ncRNAs that include examples such as Xist and HOTAIR (see here for a more complete list of ncRNAs). The number of ncRNAs encoded within the human genome is unknown, however recent transcriptomic and bioinformatic studies suggest the existence of thousands of ncRNAs.[1][2][3], but see [4] Since many of the newly identified ncRNAs have not been validated for their function, it is possible that many are non-functional.[5]