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Journal of Dental Research
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Extracellular Iodophilic Polysaccharide Synthesized by Neisseria in Human Dental Plaque

J.D. Ruby

Department of Microbiology, Division of Plant and Soil Sciences, and School of Dentistry, West Virginia University, Morgantown, West Virginia 26506

R.E. Shirey

Department of Microbiology, Division of Plant and Soil Sciences, and School of Dentistry, West Virginia University, Morgantown, West Virginia 26506

V.F. Gerencser

Department of Microbiology, Division of Plant and Soil Sciences, and School of Dentistry, West Virginia University, Morgantown, West Virginia 26506

D.A. Stelzig

Department of Microbiology, Division of Plant and Soil Sciences, and School of Dentistry, West Virginia University, Morgantown, West Virginia 26506

Dental plaque collected from the labial aspect of the anterior dentition of children harbored Neisseria that synthesized an extracellular iodophilic polysaccharide (EIP) from sucrose. Gas chromatograms of fully-acetylated EIP derivatives indicated that glucose (97%) and galactose (3%) were the only monosaccharide constituents present. The characterization of the partially-methylated alditol acetate (PMAA) derivatives of EIP indicated that it was primarily a linear 1,4 glucan (75.5%), with some 1,6 glucan (8.4%). The relative linearity of EIP (96.6%) as compared to that of amylose and glycogen was confirmed by spectrophotometric absorption studies.

Journal of Dental Research, Vol. 61, No. 5, 627-631 (1982)
DOI: 10.1177/00220345820610050101
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