Page 72 - The Manga Guide to Biochemistry
P. 72

Carbon fixation is a reaction
  that uses chemical energy,
    stored as ATP, to create
      saccharides, using the
   carbon dioxide in the air
          as a raw material.

                                                                Saccharides

  That's the carbon dioxide                         Carbon
 that's produced by humans                          fixation
 and other animals, isn’t it?

  And the reaction also needs the
chemical energy that was created

       by photophosphorylation.

        First, CO2 bonds         The chemical energy                         And this glyceraldehyde
       with a substance      of ATP and the reducing                             3-phosphate is used
      called ribulose-1,    power of NADPH are used                             to produce glucose,
     5-bisphosphate to      to create two molecules                             fructose, and other
form two molecules of                                                                   saccharides.
  3-phosphoglycerate,            of glyceraldehyde
       which have three       3-phosphate from this
   carbon atoms apiece.
                                3-phosphoglycerate.

                                                                                              Saccharides

                                                                                              Saccharides

    (ribulose-1,                               (1,3-bisphosphoglycerate)     (glyceraldehyde
5-bisphosphate)                                                                 3-phosphate)

                         (3-phosphoglycerate)

                Bonding of  Use of chemical energy
            carbon dioxide
                                                    So carbon dioxide
58 Chapter 2                                            is bound first,

                                                    and then chemical
                                                       energy is used.
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