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. 1979 Apr;63(4):635–638. doi: 10.1104/pp.63.4.635

Energy-linked Sulfate Uptake by Corn Mitochondria via the Phosphate Transporter 1

Samir Abou-Khalil a, John B Hanson a
PMCID: PMC542886  PMID: 16660781

Abstract

Corn shoot mitochondria possess an energy-linked transport system for sulfate uptake as demonstrated by osmotic swelling and [35S]SO42− accumulation. Maximum uptake is secured in the presence of Mg2+ and oligomycin with sucrose for osmotic support. Neither phosphate nor dicarboxylate anions are required. When added simultaneously, millimolar concentrations of phosphate block [35S]SO42− uptake after the initial minute. Mersalyl, N-ethylmaleimide, and 2,4-dinitrophenol are strong inhibitors of sulfate uptake; n-butylmalonate is a weak inhibitor. These inhibitors act in the same fashion on phosphate uptake. It is concluded that sulfate uptake in the absence of phosphate is by the phosphate transporter.

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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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