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  • Title: The effect of high protein diet on the regulatory properties of AMP deaminase from chicken liver.
    Author: Spychała J, Marszałek J.
    Journal: Acta Biochim Pol; 1986; 33(3):187-93. PubMed ID: 3028018.
    Abstract:
    Feeding high protein diet for 5 days caused a 3,5-fold and 2-fold increase of the activity of xanthine dehydrogenase (EC 1.2.1.37) and 5-nucleotidase (EC 3.1.3.31) respectively, in chicken liver. Six hours after feeding the high protein diet there was no change in either enzyme activity although a 3-fold increase in the level of serum uric acid was observed. High protein diet considerably decreased the activity of AMP deaminase at low, but not at high substrate concentration. The activity ratio, measured at 10.0 and 0.16 mM AMP increased from 14:1 (low protein diet) to 23:1 and 24:1 after 6 h and 5 days of high protein diet, respectively. It has been suggested that feeding birds a high protein diet may cause transformation of liver AMP deaminase (EC 3.5.4.6) from a low Km form toward a high Km form.
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