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Journal of Dental Research
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Plasmid DNA Satellite Bands Seen in Lysates of Streptococcus mutans that Form Insoluble Extracellular Polysaccharides

Masako Higuchi

Department of Oral Biochemistry, School of Dentistry, and Laboratory for Radioisotopic Research, School of Medicine, Tohoku University, Sendai 980, Japan

Shinpei Araya

Department of Oral Biochemistry, School of Dentistry, and Laboratory for Radioisotopic Research, School of Medicine, Tohoku University, Sendai 980, Japan

Masataka Higuchi

Department of Oral Biochemistry, School of Dentistry, and Laboratory for Radioisotopic Research, School of Medicine, Tohoku University, Sendai 980, Japan

When two different strains of Streptococcus mutans, PK-1 and JC-2, were used to prepare cell lysates, a satellite band of plasmid deoxyribonucleic acid (DNA) was seen. The mutants of PK-1 and JC-2 were defective in their ability to synthesize insoluble extracellular polysaccharides and had no detectable satellite band of DNA. These mutants were induced by treatment with ethidium bromide, acridine orange, or sodium dodecyl sulfate.

Journal of Dental Research, Vol. 55, No. 2, 266-271 (1976)
DOI: 10.1177/00220345760550021801
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M. Higuchi, M. Higuchi, and A. Katayose
Identification of PK 1 Bacteriophage DNA in Streptococcus mutans
Journal of Dental Research, February 1, 1982; 61(2): 439 - 441.
[Abstract] [PDF]

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J. L. Streckfuss, D. Perkins, I. M. Horton, L. R. Brown, S. Dreizen, and L. Graves
Fluoride Resistance and Adherence of Selected Strains of Streptococcus mutans to Smooth Surfaces After Exposure to Fluoride
Journal of Dental Research, February 1, 1980; 59(2): 151 - 158.
[Abstract] [PDF]