title: Morphology and nucleic acid composition of the Azotobacter bacteriophages.
abstract: Long-tailed azotophages of two different serological groups have deoxyribonucleic acid species whose densities correspond to a molar percentage of guanine plus cytosine of 52 to 53. Similar measurements on the short-tailed phages gave values of 56 to 57 moles percent. The azotophages include representatives of the three morphological types classified by Bradley as groups A, B, and C.
mesh_terms: D001395:Azotobacter; D001434:Bacteriophage Typing; D001435:Bacteriophages / Q000032:analysis*; D002499:Centrifugation, Density Gradient; D003596:Cytosine / Q000032:analysis; D004279:DNA, Viral / Q000032:analysis*; D006147:Guanine / Q000032:analysis; D008854:Microscopy, Electron; D009500:Neutralization Tests; D012703:Serotyping; D014764:Viral Proteins
chemical_list: D004279:DNA, Viral; D014764:Viral Proteins; D006147:Guanine; D003596:Cytosine