ISSN:
0006-3592
Keywords:
Chemistry
;
Biochemistry and Biotechnology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Immobilized whole cells of Clostridium butyricum reduced both NAD+ and NADP+ in the presence of hydrogen at a pressure of 100 atm. The NAD+ and NADP+ reduction activities were 4.45 and 4.30 U/g dry cells, respectively [U = NAD(P)H regenerated, μ mol/min]. The amount of NADH regenerated by immobilized cells increased with increasing hydrogen pressure above 10 atm. Immobilized cells (6 mg dry cells) of Cl. butyricum completely converted NAD+ (6.4 μmole) to NADH for 5 h, whereas only 60% of NAD+ were reduced by free cells. Immobilized cells retained 89% activity after the 5-h reactions were repeated 4 times. L-Alanine was continuously produced at the rate of 12.8 μmol/min g dry cells from hydrogen, ammonium, and pyruvate with immobilized Cl. butyricum-alanine dehydrogenase.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bit.260270902
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