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An amylase (/ ˈ æ m ɪ l eɪ s /) is an enzyme that catalyses the hydrolysis of starch (Latin amylum) into sugars.Amylase is present in the saliva of humans and some other mammals, where it begins the chemical process of digestion.
The starch iodine test, a development of the iodine test, is based on colour change, as α-amylase degrades starch and is commonly used in many applications. A similar but industrially produced test is the Phadebas amylase test, which is used as a qualitative and quantitative test within many industries, such as detergents, various flour, grain ...
Working from the non-reducing end, β-amylase catalyzes the hydrolysis of the second α-1,4 glycosidic bond, cleaving off two glucose units at a time. During the ripening of fruit, β-amylase breaks starch into maltose, resulting in the sweet flavor of ripe fruit. β-amylase is present in an inactive form prior to seed germination.
Amylolytic process or amylolysis is the conversion of starch into sugar by the action of acids or enzymes such as amylase. [1]Starch begins to pile up inside the leaves of plants during times of light when starch is able to be produced by photosynthetic processes.
Hydrolysis (/ h aɪ ˈ d r ɒ l ɪ s ɪ s /; from Ancient Greek hydro- 'water' and lysis 'to unbind') is any chemical reaction in which a molecule of water breaks one or more chemical bonds. The term is used broadly for substitution , elimination , and solvation reactions in which water is the nucleophile .
β-amylase catalyses the hydrolysis of starch into maltose by the process of removing successive maltose units from the non-reducing ends of the chains. γ-Amylase will cleave the last α(1–4)glycosidic linkages at the nonreducing end of amylose and amylopectin , yielding glucose.
In enzymology, a starch synthase (EC 2.4.1.21) is an enzyme that catalyzes the chemical reaction. ADP-glucose + (1,4-alpha-D-glucosyl) n ADP + (1,4-alpha-D-glucosyl) n+1 Thus, the two substrates of this enzyme are ADP-glucose and a chain of D-glucose residues joined by 1,4-alpha-glycosidic bonds, whereas its two products are ADP and an elongated chain of glucose residues.
Maltase is an informal name for a family of enzymes that catalyze the hydrolysis of disaccharide maltose into two simple sugars of glucose. Maltases are found in plants, bacteria, yeast, humans, and other vertebrates. Digestion of starch requires six intestinal enzymes. Two of these enzymes are luminal endo-glucosidases named alpha-amylases.