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. 2014 Nov 27;15(1):1029. doi: 10.1186/1471-2164-15-1029

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© Ma et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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An overview of the starch biosynthesis processes in wheat endosperm. The starch biosynthesis includes sucrose degradation pathway, photosynthesis pathway as the raw materials source and starch biosynthesis pathway, and consists of two distinct phases: the glucan initiation process and the starch amplification process. ADPG is mainly synthesized by the cytosolic AGPase SSU and LSU, or supplied by sucrose degradation. The subsequent mechanisms underlying the glucan initiation process remain to be established. Branched dextrins are putatively processed by the coordinated activities of SS, BE, and/or DBE to produce the prototype of an amylopectin cluster structure, which further develops into amylopectin to establish the basic structure. Amylose is mainly synthesized by GBSS. Two AGPase SSU, two AGPase LSU and one Susy were phosphorylated. The protein levels are shown in coloured squares, indicating the change of expression for each developmental stage.