title: Phi X174 heteroduplexes: preparation and some biological and physical properties.
mesh_terms: D001435:Bacteriophages; D055598:Chemical Phenomena; D002621:Chemistry; D004261:DNA Replication; D004269:DNA, Bacterial / Q000302:isolation & purification; D004926:Escherichia coli
chemical_list: D004269:DNA, Bacterial