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J Gen Microbiol. 1982 Jan;128(1):219-22.

Generation of a membrane potential by one of two independent pathways for nitrite reduction by Escherichia coli.

Abstract

A set of four isogenic Escherichia coli strains has been constructed in which all possible combinations of NADH- and formate-dependent nitrite reductases are active or inactive. Each pathway can be inactivated genetically without a corresponding loss in the other activity: the two pathways are therefore biochemically independent. The generation of a membrane potential during nitrite reduction by formate has been demonstrated using an ion-selective electrode specific for a lipophilic cation. The observed energy conservation results, at least in part, from the ability of formate dehydrogenase in E. coli to pump protons.

PMID:
6283015
DOI:
10.1099/00221287-128-1-219
[PubMed - indexed for MEDLINE]
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