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. 1975 Mar-Apr;54(2):290-7.

Levans: I. Fractionation, solution viscosity, and chemical analysis of levan produced by Streptococcus salivarius

J Ehrlich, S S Stivala, W S Bahary, S K Garg, L W Long, E Newbrun
  • PMID: 1054339

Levans: I. Fractionation, solution viscosity, and chemical analysis of levan produced by Streptococcus salivarius

J Ehrlich et al. J Dent Res. 1975 Mar-Apr.

Abstract

Levan produced by Streptococcus salivarius was fractionated into a series of 20 fractions of varying molecular weight. The range of intrinsic viscosities of the fractions was 0.07 to 0.18 dl/gm in water and 0.20 to 0.29 dl/gm in dimethyl sulfoxide. The molecular weight of the unfractionated leval determined by light scattering was 31.5 times 10-6. Small amounts of fatty acids and protein were found associated with levan.

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