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Starch is the major storage carbohydrate in plants. It is comprised of glucans that form semicrystalline granules. Glucan phosphorylation is a prerequisite for normal starch breakdown, but phosphoglucan metabolism is not understood. A putative protein phosphatase encoded at the Starch Excess 4 (SEX4) locus of Arabidopsis thaliana was recently shown to be(More)
Eukaryotic cells are composed of a variety of membrane-bound organelles that are thought to derive from symbiotic associations involving bacteria, archaea, or other eukaryotes. In addition to acquiring the plastid, all Archaeplastida and some of their endosymbiotic derivatives can be distinguished from other organisms by the fact that they accumulate(More)
Starch is the major storage carbohydrate in plants. It is comprised of glucans that form semicrystalline granules. Glucan phosphorylation is a prerequisite for normal starch breakdown, but phosphoglucan metabolism is not understood. A putative protein phosphatase encoded at the Starch Excess 4 (SEX4) locus of Arabidopsis thaliana was recently shown to be(More)
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