Results 221 to 230 of about 129,688 (259)

Enzyme induction and repression in Arthrobacter crystallopoietes

Archiv f�r Mikrobiologie, 1972
Catabolic effects which exert control over the inducible synthesis of three enzymes in Arthrobacter crystallopoietes involve at least three different mechanisms: interference with inducer transport, severe catabolite repression, and transient repression.
S L, Schechter, Z, Gold, T A, Krulwich
openaire   +2 more sources

Repression and the Control of Cyclic Enzyme Synthesis in Bacillus subtilis

Nature, 1966
Millicent Masters
exaly   +3 more sources

Enzyme induction and repression in anabolic and catabolic pathways

Archiv f�r Mikrobiologie, 1967
Microorganisms have evolved enzymes which catalyze a large number of reactions in the sequences to form essential cellular constituents and liberate energy and carbon for cellular processes. Regulation of the use of energy and of the monomeric cellular precursors to the synthesis of those enzymes required under changing environmental conditions depends
I C, Gunsalus, A U, Bertland, L A, Jacobson   +2 more
openaire   +2 more sources

Repressible and inducible enzymic forms of dimethylnitrosamine-demethylase

Zeitschrift f�r Krebsforschung und Klinische Onkologie, 1977
Two enzymic forms, with different kinetic characteristics and responding in opposite ways to in vivo “enzyme inducer” pretreatment, underlie hepatic dimethylnitrosamine(DMN)-demethylase activity. Determination of the Hofstee plot of DMN-demethylase using a DMN substrate concentration range of 0.5 to 200 mM yields three intersecting line segments from ...
J C, Arcos, D L, Davies, C E, Brown, M F, Argus   +3 more
openaire   +2 more sources

Parameters deducible from the kinetics of enzyme induction and repression

Journal of Theoretical Biology, 1967
Abstract A model of enzyme induction and repression is derived in terms of the four microscopic parameters: transcription time of the message, ribosome scanning time over a message, ribosome scanning interval in an active polyribosome and the decay constant of the message.
R D, Parker, T L, Lincoln
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Induction and repression of enzymes in microbial culture

Journal of Chemical Technology and Biotechnology, 1981
AbstractKinetic models of induction and repression of microbial enzymes are reviewed with a special emphasis on the mathematical formulation of quantitative aspects of the regulation mechanisms. In connection with this, some chemostat data have been collected from the literature.
openaire   +2 more sources

DRUG-METABOLISING ENZYMES IN THE HUMAN PLACENTA, THEIR INDUCTION AND REPRESSION

The Lancet, 1973
Abstract The human full-term placenta has significant activities of hexobarbitone oxidase, p -nitroreductase, and 1-leucyl-β-naphthylamide splitting enzyme. Ethylmorphine-N-demethylase, cytochrome P 450 , and U.D.P.-glucuronyl transferase were not detected.
David Kyegombe, Charles Franklin, Paul Turner   +2 more
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Yeast Malate Dehydrogenase: Enzyme Inactivation in Catabolite Repression

European Journal of Biochemistry, 1967
The apparent inactivation of malate dehydrogenase activity in yeast following exposure to glucose has been studied. It was found to be prevented by inhibition of protein synthesis with cycloheximide, by addition of sodium azide, and by chilling the yeast to 0°.
J J, Ferguson, M, Boll, H, Holzer
openaire   +2 more sources

Enzyme repression in the arginine pathway ofSaccharomyces cerevisiae

Antonie van Leeuwenhoek, 1969
Enzyme repression in the arginine pathway ofSaccharomyces cerevisiae was demonstrated by comparison of specific enzyme activities in yeast grown with and without arginine in various mineral salts media. Of the enzymes tested only ornithine transcarbamoylase was found to be repressed by exogenous arginine.
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Enzyme Repression in Anabolic Pathways

2004
Fifty years ago, the following observation was made at the Pasteur Institute: if the wild-type of E. coli was grown in the presence of an exogenous amino acid, the content of an enzyme involved in the biosynthesis of this amino acid was significantly lower in the cell suspensions or the extracts from these bacteria. Table 1 illustrates this observation
openaire   +1 more source