Sinh học - Chapter 15 (part 3): Carbon fixation (dark reactions)

Chapter 15 (part 3)Carbon Fixation (dark reactions)Carbon Dioxide FixationReductive Pentose Phosphate Cycle6CO2+9ATP+5H20  9ADP+8Pi+6NADP++(DHAP or G3P)Ribulose-1,5-Bisphosphate carboxylase/oxygenase (rubisco)Activation of RubiscoMg2+ plays role in binding and activating R 1,6-BP to accept CO2Rubisco Rxn MechanismscarboxylaseoxygenaseReductive Pentose Phosphate CycleReduction StagePhosphoglycerate kinaseGlyceraldehyde dehydrogenasealdolaseF 1,6-bisphophatasecytosolReductive Pentose Phosphate CycleTransketolases and Aldolases are used to make 5 carbon sugarsFormation of 5 Carbon SugarsF-6-P + 2 G3P + DHAP + 3 ATP  3 R-1,5-BP + 3 ADPRegulation of RPP CycleThioredoxinOxygenase Activity of RubiscoPhotorespiration C4 PhotosynthesisCAM Photosynthesisstoma