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Both Subunits of ADP-Glucose Pyrophosphorylase Are Regulatory
2004
Plant Physiology
The allosteric enzyme ADP-Glc pyrophosphorylase (AGPase) catalyzes the synthesis of ADP-Glc, a rate-limiting step in starch synthesis. Plant AGPases are heterotetramers, most of which are activated by 3-phosphoglyceric acid (3-PGA) and inhibited by phosphate. The objectives of these studies were to test a hypothesis concerning the relative roles of the two subunits and to identify regions in the subunits important in allosteric regulation. We exploited an Escherichia coli expression system and
doi:10.1104/pp.103.036699
pmid:15122037
pmcid:PMC429341
fatcat:3w6bdqkqvratnjokmb225lvyjq