title: Are introns structural elements or evolutionary debris?
mesh_terms: D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D002645:Chickens; D005796:Genes; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases / Q000235:genetics
chemical_list: D005987:Glyceraldehyde-3-Phosphate Dehydrogenases