Page 229 - Thermodynamics of Biochemical Reactions
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BasicBiochemData2    229




         It is more convenient to use equcalcrx because it takes a stoichiometric number matrix and a vector of the apparent equilib-
         rium constants for a set of independent reactions in the system.  Note that this program calculates a consevation  matrix that is
         consistent with the stoichiometric  number matrix, and uses it in equcalc.  The transposed  stoichiometric  number matrix nt for
         the reactin without H2 0 is given by

                 nt =  {{-1, 1, 1));

         The apparent equilibrium constant is given by

                 calckgrime[glucose6phos+h2o+de == glucose+pi, 7, 0.251

                 108.375
         The equilibrium composition  is calculated using


                 equcalcrx[nt, {Log[108.4]), {O.l,  0, 0)]
                 {0.0000920811, 0.0999079, 0.0999079)

         The equilibrium compostion can be verified by calculating the apparent equilibrium constant with the calculated composition

                 EA(nt . Log[(9.208/10A5,  9.991/10A2, 9.991/10A2)1)

                 {108.406}

         A single enzyme-catalyzed  reaction has been used in this example, but a system of reactions can be handled  in the same way.
         The advantage of using matrices and vectors in a computer program  is that the same program can be used for large systems
         of reactions.




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