title: DNA base sequence homology between coliphages T7 and phiII and between T3 and phiII as determined by heteroduplex mapping in the electron microscope.
mesh_terms: D001483:Base Sequence; D002874:Chromosome Mapping; D003090:Coliphages / Q000032:analysis*; D004279:DNA, Viral / Q000032:analysis*; D005559:Formamides; D008854:Microscopy, Electron; D009691:Nucleic Acid Denaturation; D013045:Species Specificity
chemical_list: D004279:DNA, Viral; D005559:Formamides