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. 1975 Jun;122(3):976–986. doi: 10.1128/jb.122.3.976-986.1975

Prosthecae of Asticcacaulis biprosthecum: system for the study of membrane transport.

J S Porter, J L Pate
PMCID: PMC246149  PMID: 238952

Abstract

Prosthecae removed from cells of Asticcacaulis biprosthecum were examined for their ability to accumulate proline, alanine, aspartate, glutamate, and glucose against a concentration gradient. The transport of all of these compounds into prosthecae was stimulated by the nonphysiological electron donors phenazine methosulfate and N,N,N',N'-tetramethyl-p-phenylene diamine dihydrochloride. Reduced pyridine nucleotides caused very slight stimulation of transport of proline and glucose. Other physiological electron donors did not stimulate uptake. Evidence is presented indicating that the failure of certain potential electron donors to drive respiratory chain-linked transport is due to the inabilityof these compounds to enter prosthecae rather than to the absence of enzymes for their oxidation in prosthecae. Inhibition of respiration and uncouplers of oxidative phosphorylation, with the exception of arsenate, inhibit active transport systems of prosthecae.

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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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