Small nuclear RNA

Small nuclear RNA (snRNA) is a class of small RNA molecules that are found within the nucleus of eukaryotic cells. They are transcribed by RNA polymerase II or RNA polymerase III and are involved in a variety of important processes such as RNA splicing (removal of introns from hnRNA), regulation of transcription factors (7SK RNA) or RNA polymerase II (B2 RNA), and maintaining the telomeres. They are always associated with specific proteins, and the complexes are referred to as small nuclear ribonucleoproteins (snRNP) or sometimes as snurps. These elements are rich in uridine content.
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RNA ribonucleic acid. complementary RNA viral RNA that is transcribed from negative-sense RNA and serves as a template for protein synthesis. [more]Small nuclear RNA - Community and Resources

(snRNA): Small (90 to 300 nucleotides) RNA molecules that are not directly involved in protein synthesis but may have roles in RNA processing (splicing) and the cellular architecture.