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Journal of Dental Research
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Effects of Certain Salts on Glucosyltransferase Synthesis by Streptococcus mutans Strain PS-14

K. Takada

Department of Microbiology, Nihon University of Dentistry at Matsudo, Matsudo, Chiba 271, Japan

K. Fukushima

Department of Microbiology, Nihon University of Dentistry at Matsudo, Matsudo, Chiba 271, Japan

We investigated the effects of various salts on the synthesis of extracellular glucosyltransferase in a partially defined medium (M4) by Streptococcus mutans strain PS-14 and by certain other selected strains. The levels of glucosyltransferase produced by S. mutans strain PS-14 were found to increase to a maximum of seven-fold with increasing (NH4)2SO4 concentrations. However, at a 2% concentration of the salt, the level was stimulated 2.5-fold, and the growth was inhibited by 75%. A 1% concentration of MgS04 or NaCl also caused an increase of glucosyltransferase of six-fold or 2.4-fold, respectively. However, for S. mutans strain B-13N, the enzyme production was not stimulated by (NH4)2SO4, MgSO4, or NaCl. Moreover, the enzyme production by serotypes c, e, and f was found to be stimulated by 1% (NH4)2SO4, whereas the enzyme production by serotypes d and g was not affected.

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Journal of Dental Research, Vol. 65, No. 3, 452-455 (1986)
DOI: 10.1177/00220345860650031601
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This Article
Right arrow Abstract Freely available
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Citing Articles
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Google Scholar
Right arrow Articles by Takada, K.
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Right arrow Articles by Takada, K.
Right arrow Articles by Fukushima, K.
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Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?