Binding interactions of α-amylase with starch granules

The particle size distributions (determined by Coulter Counter) of normal and size-fractionated wheat starches with SEM images of each size fraction. Particle size distributions (A) represented as the percentage number of particles in each size bin for wheat starch (green profile) showing a classic biomodal distribution, with large A-type wheat starch granules (blue profile) and small B-type granules (red profile) distributions overlaid, demonstrating the same modal peaks. SEM image B shows fractionated A-type wheat starch. SEM image C shows fractionated B-type wheat starch. SEM image D shows parent wheat starch with large and small granules together.