Biopolymer pullulan (polysaccharide) with potential as a edible coating & film and their application in food additives and drug

which consists of maltotriose units bind to each other by an alpha bond α (1 → 4) glucose as it contains three glucose units in successive maltotriose are bound together by an α. bond (1 → 6) glycosidic bond (α-1,6 glycosidic bond). The average molecular weight of pullulan is (0-200) glucose units. It is a natural substance found in the cell walls. It is commercially produced from the fermentation process of carbohydrates (sugar and starch) by yeast or produces enzymatic n (C6H12O5). 2 Figure 1 & Figure 2, illustrates the structure of the pullulan and the basic bonds in the pullulan and the sites of water enzymatic hydrolysis.3