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Dynamics of Rubisco inhibition during low and high light. (A) At night, CA1P accumulates in the chloroplast. CA1P inhibits Rubisco activity by binding tightly to Rubisco catalytic sites. (B) In the light, inhibitors such as CA1P or misfire products such as XuBP are removed by Rubisco activase. These sugar phosphates are then dephosphorylated by specific phosphatases that render them non-inhibitory.
