The size and shape of three water-soluble, non-ionic polysaccharides produced by lactic acid bacteria: A comparative study
Number of Authors: 4
2016 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 142, 91-97 p.Article in journal (Refereed) Published
Three water-soluble, non-ionic extracellular polysaccharides (EPS) obtained from lactic acid bacteria (S. thermophilus THS, L. helveticus K16 and S. thermophilus ST1) were subjected to a comparative study by means of multidetector size-exclusion chromatography, providing distributions and averages of molar masses, radii of gyration and intrinsic viscosities. All polysaccharides displayed random coil character. Further analysis of the data reveals differences in chain stiffness and extension that could be well correlated to structural features. The calculated persistence lengths ranged from 5 to 10 nm and fall within the range typical for many single-stranded bacterial or plant polysaccharides. The ST1 polysaccharide had the highest molar mass but the lowest persistence length, which is attributed to the presence of the flexible (1 6)-linkage in the main chain.
Place, publisher, year, edition, pages
2016. Vol. 142, 91-97 p.
Lactic acid bacteria, EPS, SEC-MALLS, Intrinsic viscosity, Persistence length
IdentifiersURN: urn:nbn:se:su:diva-128160DOI: 10.1016/j.carbpol.2016.01.029ISI: 000370529000013OAI: oai:DiVA.org:su-128160DiVA: diva2:915152