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Chap. 7   Questions and Problems                               41 5
                                          the rate law is




                                      (c)  In noncompetitive inhibition, the inhibitor adsorbs itself to a different type
                                          of site than the substrate to render the enzyme-substrate complex inactive.
                                          Assuming that all concentrations of  a species can be expressed by  their
                                          equilibrium concentrations, show that for noncompetitive inhibition









                                                                   1
                                                                 P+E
                                          the rate law is




                                       (d)  Sketch three different inhibitions on a Lineweaver-Burk plot.
                               W-13B  It has been  observed that substrate inhibition occurs in  the  following enzy-
                                      matic reaction:
                                                             E+S <I
                                                                         E*S
                                                              E.S        P+E

                                                           E*S+S         S*E.S
                                       (a)  Show that the rate law for the sequence above is consistent with the plot
                                          in Figure P7-13 of  -r,  (mmol/L.min)  versus the substrate concentration
                                          S (mmoi/L). (Refer to Problem P7-12.)

















                                             o   4   o   12   16  20   24   26  32  36  40   44   40   52
                                                              S  (rnrnol/litsr)
                                                            Figure W-13
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