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  • Title: [Quaternary structure of NAD-kinase from rabbit liver].
    Author: Nguyen VT, Telepneva VI.
    Journal: Biokhimiia; 1981 Mar; 46(3):435-43. PubMed ID: 6263371.
    Abstract:
    A procedure for isolation of NAD-kinase from rabbit liver resulting in 4000-fold purification and the activity yield of 50-60% is described. The molecular weight of the NAD-kinase subunit determined by SDS electrophoresis is 30 000. The purified enzyme is a dimer. Partially purified preparations of NAD kinase contain multiple forms with mol. Weights ranging from 650 000 to 180 000 and have complex kinetic behaviour. A thermostable activator of NAD-kinase which, when added to the homogeneous enzyme preparation, destroys the linear dependence of the enzyme specific activity on concentration, was detected. The nature of multiple forms of NAD-kinase and the possible role of the activator in their formation is discussed.
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