| umls-concept:C0142661 | skos:definition | MSH: Highly conserved nuclear RNA-protein complexes that function in RNA processing in the nucleus, including pre-mRNA splicing and pre-mRNA 3'-end processing in the nucleoplasm, and pre-rRNA processing in the nucleolus (see RIBONUCLEOPROTEINS, SMALL NUCLEOLAR).,CSP: small RNA-protein complexes found in the nucleus that mediate splicing of hnRNP to mRNA by drawing together specific hnRNA sequences to form a loop, which is then excised.,NCI: A highly conserved complex comprised of small nuclear RNA and protein that plays a role in pre-rRNA processing in the nucleolus and both splicing and 3'-end processing of pre-mRNA in the nucleoplasm. | lld:umls |
