We use the Zn acetate in the methoxyethanol to help precipitate all the protein in malt extracts (i.e. to prevent haze).   However, we have recently developed an alternative precipitant [Industrial Methylated Spirits (IMS)/Zinc acetate] for this assay.   The details of this precipitant is given in the updated version of the Malt Beta Glucanase Kit booklet.

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