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Thiobacillus versutus responds to both CO2-limitation and increase in chemostat dilution rate under thiosulphate-limitation by increasing ribulose bisphosphate carboxylase specific activity. It has no high affinity CO2-concentrating mechanism like that shown in Synechococcus, and may depend on diffusional uptake of CO2/HCO3−.
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Karagouni et al. (1989) studied this question.
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