Summary
Living cells of Mycobacterium sp. NRRL B-3683 were immobilized by adsorption on different types of solid carriers in order to produce androsta-1,4-diene-3,17-dione (ADD) from cholesterol. Activated alumina proved to be the most preferred carrier for long-term operation when glucose and peptone were added to the reaction medium. In a repeated-batch process, the maximum productivity of ADD was about 0.19 g/l per day with a molar conversion rate of 77% when 1.0 g/l of cholesterol was added to the reaction medium. The half-life of the immobilized cells was more than 45 days and the system could be reactivated by incubating the immobilized cells in a cell growth medium.
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Lee, CY., Liu, WH. Production of androsta-1,4-diene-3,17-dione from cholesterol using immobilized growing cells of Mycobacterium sp. NRRL B-3683 adsorbed on solid carriers. Appl Microbiol Biotechnol 36, 598–603 (1992). https://doi.org/10.1007/BF00183235
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DOI: https://doi.org/10.1007/BF00183235