title: DNA base composition of rickettsiae.
abstract: There is a small but distinct difference in DNA base composition between the typhus and spotted fever groups of rickettsiae. The molar percentages of guanine plus cytosine for Rickettsia prowazeki, R. typhi, and R. canada are approximately 30, for R. rickettsi, R. conori, and R. akari they are about 32.5. The percentage for trench fever rickettsia, Rochalimaea quintana, is 38.6.
mesh_terms: D000818:Animals; D001412:Bacillus subtilis / Q000032:analysis; D002499:Centrifugation, Density Gradient; D002642:Chick Embryo; D003597:Cytosine Nucleotides / Q000032:analysis; D004269:DNA, Bacterial / Q000032:analysis* / Q000302:isolation & purification; D006150:Guanine Nucleotides / Q000032:analysis; D009711:Nucleotides / Q000032:analysis*; D010325:Pasteurella / Q000032:analysis; D012281:Rickettsia / Q000032:analysis*; D012283:Rickettsia prowazekii / Q000032:analysis; D012284:Rickettsia rickettsii / Q000032:analysis; D012286:Rickettsia typhi / Q000032:analysis; D013045:Species Specificity
chemical_list: D003597:Cytosine Nucleotides; D004269:DNA, Bacterial; D006150:Guanine Nucleotides; D009711:Nucleotides