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Lee, Pyung-Cheon,Lee, Woo-Gi,Lee, Sang-Yup,Chang, Ho-Nam,Chang, Yong-Keun The Korean Society for Biotechnology and Bioengine 2000 Biotechnology and Bioprocess Engineering Vol.5 No.5
Anaerobiospirillum succiniciproducens requires expensive complex nitrogen sources such as yeast extract and polypeptone for its growth and succinic acid production. It was found that A. succiniciproducens was able to grow in a minimal medium containing glucose when supplemented with corn steep liquor (CSL) as the sole complex nitrogen source. The concentration of CSL had a significant effect on the glucose consumption by A. succiniciproducent. When 10-15 g/L of CSL was supplemented, cells were grown to an OD(sub)600 of 3.5 and produced 17.8 g/L succinic acid with 20 g/L glucose. These results are similar to those obtained by supplementing yeast extract and polypeptone, thereby suggesting that succinic acid can be produced more economically using glucose and CSL.
Lee, Pyung Cheon,Holtzapple, Erik,Schmidt-Dannert, Claudia American Society for Microbiology 2010 Applied and environmental microbiology Vol.76 No.21
<B>ABSTRACT</B><P>The spheroidene monooxygenase CrtA of <I>Rhodobacter sphaeroides</I> introduces a keto group and/or hydroxy group at the ends of nonnative substrates in <I>Escherichia coli</I>, resulting in the production of novel oxocarotenoids. The heme-containing CrtA is not a P450 enzyme but a new type of oxygenase.</P>