The Calvin Cycle

The Calvin Cycle PowerPoint PPT Presentation


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Calvin Cycle = carbon fixation. Similar to Krebs CycleMetabolic pathwayStarting material is regenerated in one turn of cycleDifferent than Krebs CycleCarbon enters in CO2 molecule

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The Calvin Cycle

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1. The Calvin Cycle Light Independent Phase of Photosynthesis

2. Calvin Cycle = carbon fixation Similar to Krebs Cycle Metabolic pathway Starting material is regenerated in one turn of cycle Different than Krebs Cycle Carbon enters in CO2 molecule & leaves as G3P Cycle spends ATP as energy source Consumes NADPH as reducing power for adding high energy electrons to make G3P

3. Calvin Cycle has three phases Phase 1: Carbon Fixation – CO2 is captured Phase 2: Reduction – ATP is used & NADPH gives away electrons Phase 3: Regeneration of CO2 acceptor (RuBP) Net Synthesis of one G3P molecule G3P can be used to make organic compounds 9 ATP consumed & 6 NADPH

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