FIELD: biotechnology.
SUBSTANCE: method comprises growing cells of the strain of bacteria Rhodococcus rhodochrous RNCIM AC-1898. The cells are precipitated and washed three times with phosphate-alkaline buffered solution. It is re-suspended in the same solution and the optical density of the cell suspension is adjusted to a predetermined value, and betulin is added in the dimethyl sulphoxide solution at a concentration of from 0.5 to 3.0 g/l followed by biotransformation of betulin to betulon. And the process of biotransformation takes 24-48 hours at the optical density of the cell suspension of 2.0-2.6 (dry weight of biomass of 7-10 g/l).
EFFECT: invention enables to increase the yield of betulon.
2 cl, 2 dwg, 4 ex
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Authors
Dates
2014-09-27—Published
2013-08-08—Filed