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Zinc induces protein phosphatase 2A (PP2A) inactivation and tau hyperphosphorylation through PP2A (tyrosine 307) phosphorylation in cells and the brain, but whether Zn2+ has a direct inhibitory effect on PP2A is not clear. Here we explored the effect of Zn2+ on PP2A and their direct interaction in vitro. The results showed that Zn2+ mimicked the inhibitory effect of okadaic acid on protein phosphatase...
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