3500Ch22 - Primary site for carbon fixation logging of...

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Primary site for carbon fixation – logging of these areas has impacted the increase in
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Chapter 22: The Calvin Cycle a.k.a. - the dark cycle As the name implies these reactions do not depend directly on the presence of light. They do require ATP and the reducing equivalents of NADPH. This cycle reduces carbon atoms from carbon dioxide to hexoses.
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Synthesis of hexoses from CO2 and H2O The Calvin Cycle occurs in the stroma of chloroplasts 3 stages Fixation of CO2 by ribulose 1,5-bisphosphate to form two molecules of 3-phosphoglycerate Reduction of 3-phophoglycerate to form hexose sugars. Regeneration of ribulose 1,5-bisphophate so that more CO2 can be fixed.
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This is not the only way to fix CO2 into hexoses – but this is the only one we’ll talk about.
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Rubisco (ribulose 1,5-bisphoshate carboxylase/oxygenase Is large – contains 8 L and 8 S subunits. Makes up 16% of the protein found in chloroplasts. Most abundant protein in the world.
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This note was uploaded on 02/03/2011 for the course CHEM 3500 taught by Professor Staff during the Spring '08 term at Kennesaw.

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3500Ch22 - Primary site for carbon fixation logging of...

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