title: Mutants in a mosaic gene reveal functions for introns.
mesh_terms: D003580:Cytochromes / Q000235:genetics*; D004272:DNA, Mitochondrial / Q000235:genetics*; D005796:Genes; D005816:Genetic Complementation Test; D009694:Nucleic Acid Precursors / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics; D012441:Saccharomyces cerevisiae / Q000235:genetics*
chemical_list: D003580:Cytochromes; D004272:DNA, Mitochondrial; D009694:Nucleic Acid Precursors; D012333:RNA, Messenger