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The effect of E h on regulatory processes in facultative anaerobes
Author(s) -
Wimpenny J. W. T.
Publication year - 1969
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260110409
Subject(s) - chemostat , aeration , oxygen , facultative , hydrogenase , chemistry , citric acid cycle , biochemistry , cytochrome , enzyme , biology , bacteria , ecology , organic chemistry , genetics
On increasing aeration rate in chemostat cultures of E. coli the redox potential ( E h ) of the culture changes from −l50 mv to +250 mv. During this period only a slight increase in measured dissolved oxygen concentration is observed. It is suggested that E h be used as a control variable for aeration in the oxygen limited growth condition, whilst dissolved oxygen concentration be used as control variable in the presence of excess oxygen. Change in cytochrome b 1 , three tricarboxylic acid cycle enzymes and hydrogenase can be related to culture E h . These changes are discussed.