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- W1994772499 abstract "The production of polysaccharides from sucrose by extracellular enzymes from oral Streptococcus salivarius isolates and the physico-chemical properties of water-insoluble products (IPs) were investigated. Extracellular enzymes from all the 18 strains tested produced insoluble α-d-glucans (IGs) as well as soluble β-d-fructans, and formed adhering deposits on glass. Generally, the IPs (mostly IGs) of S. salivarius strains differed from the S. sobrinus IPs by (a) containing significant proportions of α-d-(1→4)-, in addition to α-d-(1→3)- and α-d-(1→6)-glucosyl linkages, and much higher proportions of α-d-(1→3) than α-d-(1→6) linkages, (b) being more susceptible to hydrolysis by mutanase than by dextranase, (c) possessing low or no streptococcal cell-agglutinating ability, and (d) showing weaker adhesion to a glass surface. The degree of the polysaccharide adherence differed greatly among the S. salivarius strains and, therefore, they were divided into three groups of adherence producers; heavy, moderate, and slight. The IPs of the three groups contained, generally in descending order, a higher proportions of IG containing higher proportions of -(1→6)-α-d and -(1→4)-α-d glucosyl linkages and (1→3,6) branches, but showed higher susceptibility to hydrolysis by mutanase as well as dextranase. Thus, the production and the properties of extracellular insoluble α-d-glucans from sucrose differ considerably between oral S. salivarius and cariogenic S. sobrinus." @default.
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- W1994772499 date "1970-12-01" @default.
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- W1994772499 title "Effects of inoculating a levan-forming cariogenic streptococcus on experimental caries in hamsters" @default.
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- W1994772499 doi "https://doi.org/10.1016/0003-9969(70)90030-0" @default.
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