alexa Production of poly(3-hydroxybutyrate) from inexpensive substrates.
Microbiology

Microbiology

Journal of Antivirals & Antiretrovirals

Author(s): Kim BS

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Abstract Two inexpensive substrates, starch and whey were used to produce poly(3-hydroxybutyrate) (PHB) in fed-batch cultures of Azotobacter chroococcum and recombinant Escherichia coli, respectively. Oxygen limitation increased PHB contents in both fermentations. In fed-batch culture of A. chroococcum, cell concentration of 54 g l(-1) with 46\% PHB was obtained with oxygen limitation, whereas 71 g l(-1) of cell with 20\% PHB was obtained without oxygen limitation. The timing of PHB biosynthesis in recombinant E. coli was controlled using the agitation speed of a stirred tank fermentor. A PHB content of 80\% could be obtained with oxygen limitation by increasing the agitation speed up to only 500 rpm.
This article was published in Enzyme Microb Technol and referenced in Journal of Antivirals & Antiretrovirals

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