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Oxidative phosphorylation in intact chl-r mutants of Escherichia coli K 12.

Abstract：

:The efficiency of oxidative phosphorylation was estimated in intact resting cells of Escherichia coli K 12, strain PA 601 (chl-s) and its chl-r mutants, all of them grown anaerobically in the presence of nitrate. The oxidation of endogenous NADH in intact chl-s cells was accompanied by the formation of ATP whatever the terminal electron acceptor, oxygen or nitrate, so that it was possible to conclude that the energy conservation sites are operating with either of the two acceptors in cells grown anaerobically in the presence of nitrate. For chl-r mutants oxidation of endogenous NADH correlated with ATP-production was found only with oxygen as electron acceptor. It is concluded that the energy-conservation sites are preserved in these mutants, the nitrate respiratory chain of which is altered. This assumption is corroborated by the effects of uncouplers of oxidative phosphorylation on ATP-synthesis.

journal_name

Biochimie

journal_title

Biochimie

authors

Giordano G,Rivière C,Azoulay E

doi

10.1016/s0300-9084(77)80316-7

subject

Has Abstract

pub_date

1977-01-01 00:00:00

pages

403-9

issue

4

eissn

0300-9084

issn

1638-6183

pii

S0300-9084(77)80316-7

journal_volume

59

pub_type

杂志文章

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