Polypyrimidine Tract-Binding ProteinRNA-Binding ProteinsRibonucleoproteinsHeterogeneous-Nuclear RibonucleoproteinsRNA PrecursorsAlternative SplicingHeterogeneous-Nuclear Ribonucleoprotein Group F-HRNA SplicingExonsEncephalomyocarditis virusIntronsMolecular Sequence DataBase SequenceHeLa CellsTropomyosin5' Untranslated RegionsProtein BindingRNA, MessengerGene Expression RegulationBinding SitesRibosomesProtein BiosynthesisNucleic Acid ConformationDNA-Binding ProteinsCell NucleusCell LineAmino Acid SequenceGene Expression ProfilingGene ExpressionNuclear ProteinsRNA Splice SitesMutationPyrimidinesSpliceosomesRNA, ViralHeterogeneous-Nuclear Ribonucleoprotein Group C