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  • Title: Comparative study of Streptococcus mutans extracellular glycosyltransferases by isoelectric focusing.
    Author: Tsumori H, Shimamura A, Mukasa H.
    Journal: J Gen Microbiol; 1983 Oct; 129(10):3261-9. PubMed ID: 6228639.
    Abstract:
    Extracellular glycosyltransferases from 17 strains of Streptococcus mutans were examined by analytical isoelectric focusing. Three kinds of glucosyltransferase: highly-branched-1,6-alpha-D-glucan synthetase, 1,3-alpha-D-glucan synthetase and 1,6-alpha-D-glucan synthetase, were excreted from serotype a, d and g strains. The enzymes of serotype a strains were distinguishable from those of serotypes d and g by differences in their pI values. Serotype c, e and f strains excreted basic glucosyltransferase and acidic fructosyltransferase. Serotype b strains also excreted the glucosyl- and fructosyltransferases, but the pI values were different from those of the enzymes from the other serotypes. Thus, S. mutans strains could be divided into four groups by analytical isoelectric focusing of glycosyltransferases which corresponded well to the four genetic groups.
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