Polysaccharide producing process using protease and Azotobacter
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United States of America Patent
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Nov 18, 1980
Grant Date -
N/A
app pub date -
Mar 10, 1978
filing date -
Mar 14, 1977
priority date (Note) -
Expired
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Abstract
The solution viscosity of a polysaccharide, microbial alginate, produced by culturing strains of Azotobacter vinelandii, is controlled by addition of a protease to the culture broth. The protease can be added during the culture, to obtain a polysaccharide of increased viscosity. Alternatively or additionally protease can also be added after culture but before the polysaccharide is isolated from the broth, for example, to prevent reduction of viscosity during storage. Neutral and alkaline proteases having activity at around pH 7 are particularly suitable.
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