Plants starch degradation pathway

At the present time, it would be premature to assign a purely degradative function to P-enzyme, and, in the later discussion, it will be assumed that both P-enzyme and starch-UDPglucosyl transferase are concerned with the synthesis of (1—>4)-a-D-glucosidic linkages in plant starches. Alternative metabolic pathways are not uncommon in Nature. 

Metabolism For uptake and transport of G., see Lit. d-G. plays a central part in the carbohydrate metabolism. It is degraded to smaller molecules in complicated reaction sequences (glycolysis) with release of energy - one example is pyruvic acid, which can enter the citric acid cycle via acetyl-CoA - or (pentose phosphate pathway) can be converted to derivatives of other sugars for biosynthetic purposes under the concomitant availability of reduction equivalents. Alternatively d-G. can be stored in the liver and muscles as areserve substance glycogen (in plants starch). An antimetabolite of d-G. is 5-thio-D-glucose. For detection, see Lit.. ... 

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