FIELD: chemistry.
SUBSTANCE: invention relates to biotechnology. Method of producing a chitin-glucan complex and polymers containing glucose, mannose and/or galactose is disclosed. The method includes fermentation of Pichia pastoris DSMZ 70887 yeast in a culture medium containing a nitrogen source, different from a yeast extract or peptone, and a carbon source. The carbon sources used can be pure glycerine, pure methanol and glycerine- or methanol-rich mixtures. During fermentation, pH is kept I the range of 5.0-7.0 by adding an alkali, ammonia or an ammonium salt.
EFFECT: invention enables to optimise fermentation of Pichia pastoris to achieve high cell density and high chitin content in cell walls, and polymers containing glucose, mannose and/or galactose.
20 cl, 1 dwg, 1 tbl, 2 ex
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