IntronsBase SequenceRNA SplicingExonsMolecular Sequence DataSpliceosomesRNA Splice SitesRNA PrecursorsEvolution, MolecularAmino Acid SequencePhylogenyCloning, MolecularNucleic Acid ConformationAlternative SplicingGenesSequence Homology, Nucleic AcidSequence AlignmentRNA, MessengerRNA, Small NuclearSequence Analysis, DNAConserved SequenceRNA, CatalyticEuglena gracilisRNA, FungalTranscription, GeneticRestriction MappingSequence Homology, Amino AcidDNAOpen Reading FramesBiological EvolutionModels, GeneticDNA, ComplementaryTrans-Splicing