Reductive pentose phosphate-independent CO2 fixation in Rhodobacter sphaeroides and evidence that ribulose bisphosphate carboxylase/oxygenase activity serves to maintain the redox balance of the cell.

Abstract excerpt

Whole-cell CO2 fixation and ribulose 1,5-bisphosphate carboxylase/oxygenase (RubisCO) activity were determined in Rhodobacter sphaeroides wild-type and mutant strains. There is no obvious difference in the levels of whole-cell CO2 fixation for the wild type, a form I RubisCO deletion mutant, and a form II RubisCO deletion mutant. No ribulose 1,5-bisphosphate-dependent CO2 fixation was detected in a form I-form II...

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