DNA Base Composition of Rickettsiae

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Science  27 Apr 1973:
Vol. 180, Issue 4084, pp. 415-417
DOI: 10.1126/science.180.4084.415


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.

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