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The lead is fine. The real central dogma has nothing to do with non-coding RNA. |
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{{Hatnote|Compare [[untranslated region]]s.}}
{{short description|Class of ribonucleic acid that is not translated into proteins}}
[[File:NcRNAs-central-dogma.svg|thumb|400x400px|The roles of non-coding RNAs
▲[[File:NcRNAs-central-dogma.svg|thumb|400x400px|The roles of non-coding RNAs in the [[central dogma of molecular biology]]: [[Ribonucleoprotein|Ribonucleoproteins]] are shown in red, non-coding RNAs in blue.]]
A '''non-coding RNA''' ('''ncRNA''') is a functional [[RNA]] molecule that is not [[Translation (genetics)|translated]] into a [[protein]]. The [[DNA]] sequence from which a functional non-coding RNA is transcribed is often called an RNA [[gene]]. Abundant and functionally important [[list of RNAs|types of non-coding RNAs]] include [[transfer RNA]]s (tRNAs) and [[ribosomal RNA]]s (rRNAs), as well as small RNAs such as [[microRNA]]s, [[siRNA]]s, [[piRNA]]s, [[snoRNA]]s, [[snRNA]]s, [[Extracellular RNA|exRNAs]], [[scaRNAs]] and the [[long noncoding RNA|long ncRNA]]s such as [[Xist]] and [[HOTAIR]].
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