Abstract
Bragg, P. D. (University of British Columbia, Vancouver, British Columbia, Canada) and W. J. Polglase. Effect of dihydrostreptomycin on tetrazolium dye reduction in Escherichia coli. J. Bacteriol. 85:795–800. 1963.—Sonic-disrupted extracts of Escherichia coli, grown without added antibiotic (sensitive and resistant), contained (in supernatant of fraction centrifuged at 100,000 × g) a dihydrostreptomycin-inhibitable, succinate-triphenyltetrazolium chloride (TTC) reductase activity. The succinate-TTC reductase activities of extracts of E. coli grown in the presence of dihydrostreptomycin (resistant and dependent) were relatively low and were not inhibited by the antibiotic. At a moderate magnesium concentration, the degree of inhibition by dihydrostreptomycin of succinate-TTC reductase activity was sufficiently marked to indicate an important site of action of the antibiotic. Magnesium, putrescine, and spermidine antagonized the action of dihydrostreptomycin in the succinate-TTC reductase system.
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Selected References
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