Phosphorylation of Phosphoenolpyruvate Carboxylase Is Essential for Maximal and Sustained Dark CO2 Fixation and Core Circadian Clock Operation in the Obligate Crassulacean Acid Metabolism Species Kalanchoë fedtschenkoi. - Boxall SF; Dever LV; Kneřová J; Gould PD; Hartwell J (The Plant cell, 2017)