Page 70 - The Manga Guide to Biochemistry
P. 70

The important thing here                                                     ADP, which has two
         is the reaction that                                                   phosphate groups,
                                                                            becomes ATP (adenosine
     creates this ATP, called                                                  triphosphate) if one
          phosphorylation.                                                    additional phosphate
                                                                                 group is attached.
phosphorylation?
     What kind of                                                                                        O C CC

 reaction is that?                                                                                                                          one more
                                                                                                                                           phosphate
                             Well, look...here's
                           the structure of ADP                                                                                                group
                        (adenosine diphosphate).

                              O CC

                                                                       two
                                                                 phosphate

                                                                    groups

  The reaction that
 attaches this new
phosphate group is
  phosphorylation!

                     Oh, so that must
                   be where the name
              "photophosphorylation"

                        comes from!

                       Remember, ATP is also the "common
                       currency" used in reactions other

                          than photosynthesis. Simply put,
                          it's important chemical energy!

     Let me summarize                                                       So ATP is synthesized by
photophosphorylation                                                        the flow of electrons
                                                                            triggered by sunlight...
             for you!

It's a reaction      light                                                  I understand!
    that uses                                                               Light energy

                                                                              turns into
                                                                                chemical
                                                                                 energy!

to create ATP from ADP by
        phosphorylation

56 Chapter 2
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