Enzymatic method to measure β-1,3-β-1,6-glucan content in extracts and formulated products (GEM assay)

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Abstract

An enzymatic method to measure β-glucan content (GEM assay) is applicable in a variety of matrices. The method is composed of swelling the sample with KOH and initial digestion with a lyticase, which is followed by treatment with a mixture of exo-1,3-β-D-glucanase and β-glucosidase that converts the β-glucan to glucose. The glucose generated by the enzymatic hydrolysis is measured by another enzymatic method. The method is shown to be accurate and precise. The method is selective and applicable to both highly branched and unbranched β-1,3-glucans. © 2010 American Chemical Society.

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Danielson, M. E., Dauth, R., Elmasry, N. A., Langeslay, R. R., Magee, A. S., & Will, P. M. (2010). Enzymatic method to measure β-1,3-β-1,6-glucan content in extracts and formulated products (GEM assay). Journal of Agricultural and Food Chemistry, 58(19), 10305–10308. https://doi.org/10.1021/jf102003m

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