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Deoxyribonucleic acid base compositions of hyphomicrobia

✍ Scribed by Mandel, M. ;Hirsch, P. ;Conti, S. F.

Publisher
Springer-Verlag
Year
1972
Weight
281 KB
Volume
81
Category
Article
ISSN
0003-9276

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✦ Synopsis

The deoxyribonucleic acids of 70 hyphomicrobia were examined at equilibrium in neutral CsC1 density gradients. The guanine plus cytosine (~ G + C) content was estimated to range from 59.2 to 66.8~ G A-C. The strains could be divided into three groups with different base composition of their DIqA; 61.0 i 1.1 ~ , 64.1 ~: 0.6~ and 66.5 β€’ 0.6O/o G ~-C. The values are compared with those for the base composition of DNA of a number of phototrophic, budding bacteria.

The nonphotosynthetic, organotrophic, aerobic, budding bacteria may represent colorless counterparts of photoorganotrophs (Van Nie], 1954). Among the Athiorhodaceae (= Bhodospirillaceae, Pfennig and Trfiper, 1971) at least four species have been shown to be capable of

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