[Carbon metabolism of filamentous anoxygenic phototrophic bacteria of the family Oscillochloridaceae].

The carbon metabolism of representatives of the family Oscillochloridaceae (Oscillochloris trichoides DG6 and the recent isolates Oscillochloris sp. R, KR, and BM) has been studied. Based on data from an inhibitory analysis of autotrophic CO2 assimilation and measurements of the activities of the enzymes involved in this process, it is concluded that, in all Oscillochloris strains, CO2 fixation occurs via the operation of the Calvin cycle.

[On the mechanism of autotrophic fixation of carbone dioxide by Chloroflexus aurantiacus].

The activity of two carboxylating enzymes was studied in the green filamentous bacterium Chloroflexus aurantiacus. The carboxylation reaction involving pyruvate synthase was optimized using 14CO2 and cell extracts. Pyruvate synthase was shown to be absent from cells of Cfl.