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Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

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Page 1: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

Chapter 20:The Calvin Cycle and the Pentose

Phosphate Pathway

The DARK Reactions

Page 2: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

The Calvin Cycle:a CO2Fixation!

Melvin

Page 3: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

RUBISCO!: not a cookie, butthe most abundant protein onearth! (likely)

Algae + 14CO2

Page 4: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

Page 5: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

Additional Reactions to make newsugars and regenerate RuBP:

3+6 = 5????

Page 6: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

RuBP!

Page 7: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

Regeneration of RuBP

Page 8: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

The Whole Calvin Cycle

6 CO2+ 18ATP +12 NADPH +12 H2O --> C6H12O6 + 18ADP + 18Pi +12 NADP+ + 6H+

Page 9: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

The pentose phosphate pathway

Page 10: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

Page 11: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

Page 12: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

Page 13: The DARK Reactions - University of Wisconsin–Eau Claire · Chapter 20: The Calvin Cycle and the Pentose Phosphate Pathway The DARK Reactions

The PPP adapts to cellular needs:

= greatest need

Photosynthesis – the Light and Dark Reactions Outer membrane Inner membrane Stroma Thylakoids Granum Light-dependent reactions take place in the thylakoid

Photosynthesis – the Light and Dark Reactions Outer membrane Inner membrane Stroma Thylakoids Granum Light-dependent reactions take place in the thylakoid

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