. "Increases the activity of rubisco by the removal of otherwise inhibitory sugar phosphates: RuBP, and in some plants, 2-carboxyarabinitol 1-phosphate." . . "ribulose-1,5-bisphosphate carboxylase/oxygenase activator activity" . "ribulose-1,5-bisphosphate carboxylase/oxygenase activase activity" . "ribulose-bisphosphate carboxylase activase activity" . "rubisco activase activity" . "rubisco activator" . . . .