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Recently, a new enzymatic process for glycogen production was developed. In this process, short-chain amylose is used as a substrate for branching enzymes (BE, EC 2.4.1.18). The molecular weight of the enzymatically synthesized glycogen (ESG) depends on the size and concentration of the substrate. Structural and physicochemical properties of ESG were compared to those of natural source glycogen (NSG)...
The extracellular polysaccharide produced by Bifidobacterium longum JBL05 was found to be composed of d-galactopyranosyl, d-glucopyranosyl and l-rhamnopyranosyl residues in the molar ratio of 4:2:1. Methylation analysis coupled with GC–MS, and both 1D and 2D NMR spectroscopy showed that the polysaccharide has a heptasaccharide repeating unit with the following structure:
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