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Mechanism model of OsTrxh1/h4 interaction with OsPHO2 to regulate Pi homeostasis. OsPHO2 localizes to the ER and Golgi, interacts with OsPHO1;2 and OsPHF1, and mediates the protein degradation of OsPHF1. OsPHO1;2 might be the downstream target of OsPHO2 as well. The redox status of OsPHO2 is regulated by OsTrxh1 and OsTrxh4. See text for more details.
