title: Block heterogeneity of DNA from calf thymus and E. coli.
mesh_terms: D000818:Animals; D001483:Base Sequence; D002417:Cattle; D003090:Coliphages; D004247:DNA / Q000302:isolation & purification*; D004269:DNA, Bacterial / Q000302:isolation & purification*; D004279:DNA, Viral / Q000302:isolation & purification; D004926:Escherichia coli; D008722:Methods; D008854:Microscopy, Electron; D008970:Molecular Weight; D009691:Nucleic Acid Denaturation; D013057:Spectrum Analysis; D013696:Temperature; D013950:Thymus Gland; D014783:Viscosity
chemical_list: D004269:DNA, Bacterial; D004279:DNA, Viral; D004247:DNA