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METHOD FOR CONTROLLING STREPTOCOCCUS PNEUMONIAE POLYSACCHARIDE MOLECULAR WEIGHT USING CARBON DIOXIDE
专利权人:
Wyeth LLC
发明人:
Jean Heather Crinean
申请号:
US16912032
公开号:
US20200323974A1
申请日:
2020.06.25
申请国别(地区):
US
年份:
2020
代理人:
摘要:
The present invention provides improved methods for producing a solution containing high molecular weight isolated Streptococcus pneumoniae capsular polysaccharides having phosphodiester linkages between saccharide repeat units. In certain methods, CO2 is supplied to a fermentation culture of Streptococcus pneumoniae bacterial cells that produce capsular polysaccharide serotypes containing phosphodiester linkages between saccharide repeat units. Exemplary Streptococcus pneumoniae serotypes containing a phosphodiester linkage between saccharide repeat units include serotypes 6A, 6B, 19A, and 19F. Supplying CO2 to the fermentation culture includes adding bicarbonate ions to the fermentation culture, adding carbonate ions to the fermentation culture, adding mixtures of bicarbonate and carbonate ions to the fermentation culture, and overlaying the fermentation culture with CO2.
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