title: The nucleotide composition and pyrimidine clusters in DNA from beef heart mitochondria.
mesh_terms: D000818:Animals; D001483:Base Sequence; D002417:Cattle; D002467:Cell Nucleus / Q000032:analysis; D002499:Centrifugation, Density Gradient; D002855:Chromatography, Thin Layer; D004272:DNA, Mitochondrial; D003854:Deoxyribonucleotides / Q000032:analysis; D008854:Microscopy, Electron; D008931:Mitochondria, Muscle / Q000032:analysis*; D009206:Myocardium / Q000032:analysis / Q000166:cytology; D011743:Pyrimidines / Q000032:analysis; D013056:Spectrophotometry, Ultraviolet; D014461:Ultracentrifugation
chemical_list: D004272:DNA, Mitochondrial; D003854:Deoxyribonucleotides; D011743:Pyrimidines