In aid of Children In Need -A one day Masterclass on the understanding of starch and its interactions in food -Cramming 26 years of experience in research and teaching of all things starch -Prof Sandra Hill will deliver a one day marathon session -Wednesday the 19th of November at the University Starch has two major components: amylose and amylopectin. These polymers are very different structurally, amylose being linear and amylopectin highly branched - each structure playing a critical role in the ultimate functionality of the native starch and its derivatives. The amylose/amylopectin ratios of starches can be genetically manipulated and offer a significant opportunity for the researcher with certain crops. Viscosity, shear resistance, gelatinization, textures, solubility, tackiness, gel stability, cold swelling and retrogradation are all functions of their amylose/amylopectin ratio. When aiming at functional properties in starch, most commercial companies examine the characteristics of competitive starches in particular applications. This sets the target to shoot for. For those characteristics which are unattainable with native starches, the only alternative is to look towards some form of value-addition to achieve the desired results. Value- addition can be as simple as sterilizing products required for the pharmaceutical industry to highly complex chemical modification to confer properties totally different from the native starch.