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Working Model of WKS1.1 Regulation of Cell Death.
The WKS1.1 protein is imported into the chloroplast, where it phosphorylates tAPX, reducing its ability to detoxify the H2O2 generated by photosynthesis. The dotted blue line indicates reduced peroxidase activity, and the dotted red line indicates increased H2O2 concentration, which causes cell death. PSI, photosystem I; PSII, photosystem II.
