What is mixed-linkage β -glucan that you can measure using β-Glucan Assay Kit (K-BGLU)?

The cereal β-glucans (so-called mixed-linkage β-glucans) are linear polysaccharides in which D-glucosyl residues are linked 1,3-β- and 1,4-β-, and the ratio of these linkage types varies with the source of the β-glucan (e.g., oats, barley, and wheat).

Product Page (K-BGLU)