Page 167 - The Manga Guide to Biochemistry
P. 167

What Is an Enzyme?                          For now, let's focus

                                      on n. Within the enormous

                                       number of proteins in our
                                     bodies, a surprisingly large

                                         percentage of them are
                                       used to advance chemical

                                                      reactions.

n Advance chemical reactions.

In other words, advancing chemical
     reactions is one of the most

important jobs that proteins have.

For example, let's look at                                    Another
the chemical reaction that                                    protein

   happens when a person
          drinks alcohol.

                                     A protein

alcohol

         Liver              Heave                             Heave
metabolism                    ho!                               ho!
metabolism
                            alcohol  Chemical   Acetaldehyde  Chemical  Acetate

                                     reaction                 reaction

                                        Enzymes Advance
                                     chemical reactions!

                         Enzymes!                             We discussed enzymes
                          Sounds                                   briefly when we
                         familiar,
                        but I can't                             were talking about
                        remember                                   fat accumulation
                                                                      (see page 112).
                             why...

    A protein that      And yet...
advances chemical                  That's not all
reactions like this
                                enzymes can do.
       is called...
                                                                Enzymes Are the Keys to Chemical Reactions  153
         An enzyme or
            an enzyme
              protein.
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