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US 4,291,156 AGranted
Polysaccharide S-53 and bacterial fermentation process for its preparation
AssigneeMerck & Co., Inc.
InventorsKenneth S. Kang, George T. Veeder
Life of this patent
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Abstract
A novel polysaccharide S-53, having a composition of 18-19% uronic acid, 4.8% pyruvate, and 7% acetyl as the O-glycosidically linked ester; and the remainder neutral sugar, 51% glucose and 49% fucose. This polysaccharide is produced by the strain of Klebsiella pneumoniae, ATCC No. 31488 growing in a suitable fermentation medium.
Claims1
Heteropolysaccharide S-53, containing 4.8% pyruvate, 7% acetyl, and 18-19% uronic acid;
- the rest being neutral sugar, 51% glucose and 49% fucose;
- said heteropolysaccharide being incompatible with methylene chloride dye and compatible with milling green dye, being substantially insoluble in water-miscible alcohols, such as methanol, ethanol and isopropanol, and ketones like acetone, and soluble in water and having an infrared spectra characterized by peaks at 3400 cm.sup.-1, 2950 cm.sup.-1, 1720 cm.sup.-1, and 1600 cm.sup.-1.
Dependencies are inferred from the claim text.