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. 2020 Oct 26;117(45):28036–28045. doi: 10.1073/pnas.2011315117

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Copyright © 2020 the Author(s). Published by PNAS.

This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).

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Fig. 2. — Calcium dependence of photoactivation under sequence of single turnover flashes at 2 Hz (500-ms flash interval) of HA-extracted thylakoid membranes from WT control at 0 (black circle), 2 (blue square), 5 (purple diamond), 10 (red circle), 20 (green square), and 40 (orange diamond) mM of CaCl₂ combined with 250 μM (A) or 500 μM MnCl₂ (B). (C) Overall quantum efficiency of photoactivation (Φ_PA). (D) Quantum efficiency of inactivation (Φ_PI). Data were fit to Eq. 1 for parameter estimation. Error bars represent SD with n ≧ 3.