Classification of wheat starch

Wheat starch granules are divided in two groups by size, B-starch (15 - 20 %) is 2 - 15 m diameter and the larger A-starch granules (80 - 85 %) are 20 - 35 m. B-starch is contaminated with pentosans, fibres, lipids and protein to an extent requiring special treatment in the factory