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Chapter 15 (part 3)

Chapter 15 (part 3). Carbon Fixation (dark reactions). Carbon Dioxide Fixation. Reductive Pentose Phosphate Cycle. 6CO 2 +9ATP+5H 2 0  9ADP+8Pi+6NADP + +(DHAP or G3P). Ribulose-1,5-Bisphosphate carboxylase/oxygenase (rubisco). Activation of Rubisco.

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Chapter 15 (part 3)

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  1. Chapter 15 (part 3) Carbon Fixation (dark reactions)

  2. Carbon Dioxide Fixation

  3. Reductive Pentose Phosphate Cycle 6CO2+9ATP+5H20  9ADP+8Pi+6NADP++(DHAP or G3P)

  4. Ribulose-1,5-Bisphosphate carboxylase/oxygenase (rubisco)

  5. Activation of Rubisco

  6. Mg2+ plays role in binding and activating R 1,6-BP to accept CO2

  7. Rubisco Rxn Mechanisms carboxylase oxygenase

  8. Reductive Pentose Phosphate Cycle

  9. cytosol F 1,6-bisphophatase aldolase Glyceraldehyde dehydrogenase Phosphoglycerate kinase Reduction Stage

  10. Reductive Pentose Phosphate Cycle

  11. Transketolases and Aldolases are used to make 5 carbon sugars

  12. Formation of 5 Carbon Sugars

  13. F-6-P + 2 G3P + DHAP + 3 ATP  3 R-1,5-BP + 3 ADP

  14. Regulation of RPP Cycle

  15. Thioredoxin

  16. Oxygenase Activity of Rubisco

  17. Photorespiration

  18. C4 Photosynthesis

  19. CAM Photosynthesis stoma

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