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. 1969 Feb;111(4):385–394. doi: 10.1042/bj1110385

Control of δ-aminolaevulate synthetase activity in Rhodopseudomonas spheroides

J Marriott 1, A Neuberger 1, G H Tait 1
PMCID: PMC1187556  PMID: 5774467

Abstract

1. δ-Aminolaevulate synthetase from Rhodopseudomonas spheroides grown semi-anaerobically undergoes a spontaneous activation during the first hour after the disruption of cells when homogenates are stored at 4°. 2. After cultures of R. spheroides growing semi-anaerobically are oxygenated no activation of δ-aminolaevulate synthetase occurs in cell extracts. Cessation of activation in extracts is almost complete 10min. after oxygenation of cells has begun. 3. A heat-stable fraction of low molecular weight from semi-anaerobic cells reactivates δ-aminolaevulate synthetase in extracts of oxygenated cells and appears to contain a compound responsible for the spontaneous activation. 4. A heat-stable fraction of low molecular weight from oxygenated cells inhibits the spontaneous activation in extracts of semi-anaerobic cells. 5. The effect of oxygen on the rate of bacteriochlorophyll synthesis in R. spheroides may be mediated through alterations in the concentrations of a low-molecular-weight activator and inhibitor of δ-aminolaevulate synthetase.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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