Product inhibition analyzed equation

Let us analyze the structure of eqn. (70). Its numerator can be written as K+ [A] - K [B], where K+ = Aq 2 3 and K = k 1k 2k 3. In this form, it corresponds to the brutto-equation of the reaction A = B obtained by adding all the steps of the detailed mechanism with unit stoichiometric numbers. The numerator is a kinetic equation for the brutto-reaction A = B considered to be elementary and fitting the mass action law. The denominator accounts for the "non-elementary character due to the inhibition of the complex catalytic reaction rate by the initial substances and products. 

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