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  • Title: THE EQUILIBRIUM OF THE REACTION CATALYSED BY CITRATE OXALOACETATE-LYASE.
    Author: TATE SS, DATTA SP.
    Journal: Biochem J; 1965 Feb; 94(2):470-7. PubMed ID: 14348207.
    Abstract:
    1. A method of preparation and purification of citrate oxaloacetate-lyase (EC 4.1.3.6) from Aerobacter aerogenes is described. 2. The equilibrium of this reaction has been determined at pH 8.4 and 25 degrees . It has been shown that K, i.e. [citrate(3-)]/[oxaloacetate(keto) (2-)][acetate (-)], is 3.08+/-0.72, but that K(app.), i.e. [total citrate]/[total oxaloacetate][total acetate], is markedly affected by the initial concentrations of the reactants and magnesium. 3. The free-energy change during the cleavage of citrate has been calculated and compared with data from other sources. 4. The free energy of hydrolysis of acetyl-CoA has been evaluated from the present data. 5. A detailed knowledge of the interactions of the reactants with metal ions has been shown to be important in the calculation of the equilibrium constant and related thermodynamic functions.
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