Summary
D(−)-3-hydroxybutanoic acid was produced by a double mutant of Alcaligenes eutrophus, unable to synthesize poly-3-hydroxybutanoic acid and to utilize 3-hydroxybutanoate as a substrate. About 3.4 g of 3-hydroxybutanoate/l were produced under optimum conditions at pH 7.0 to 7.3, at a temperature of 30°C after exhaustion of ammonia and at restricted aeration rates allowing 10–12% of the maximum respiratory rate of the cells to occur. D(−)-3-hydroxybutanoic acid was identified by means of gas and ion exchange chromatography, IR-spectrometry and specific rotation.
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Vollbrecht, D., Schlegel, H.G. Excretion of metabolites by hydrogen bacteria. European J. Appl. Microbiol. Biotechnol. 7, 259–266 (1979). https://doi.org/10.1007/BF00498020
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DOI: https://doi.org/10.1007/BF00498020