Biochemical Genetics

, Volume 23, Issue 7–8, pp 525–538 | Cite as

Comparison of glucokinase in C3H/He and C58 mice that differ in their hepatic activity

  • Patricia A. James
  • F. Louise Lavender
  • Gillian M. Lawrence
  • Deryck G. Walker


Partially purified preparations of the hepatic glucokinase from C3H/He and C58 inbred mice have been used to explore the molecular basis for the observed twofold difference in activity between the strains. The single codominant gene that appears to regulate activity, the alleles of which are designated Gka and Gkb, respectively, for the two strains, could represent a structural gene change. This now seems unlikely because the mouse enzyme, although showing small differences from rat glucokinase, appeared to be identical in the two strains with respect to thermal stability, electrophoretic mobility in agarose gels, and kinetic properties such as the apparent Km values for MgATP2− and glucose and the unique cooperative interaction with the latter substrate. The enzymes also reacted identically in a range of immunological tests (double-diffusion, immunoelectrophoresis, immune precipitation and immune inhibition assays) and ELISA immune inhibition assays indicated that the twofold difference in activity was due to a similar difference in antigenically active enzyme. Genetic control over the physiologically significant regulation of enzyme amount is therefore probable.

Key words

hepatic glucokinase inbred mice kinetic properties immunological identity 


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Copyright information

© Plenum Publishing Corporation 1985

Authors and Affiliations

  • Patricia A. James
    • 1
  • F. Louise Lavender
    • 1
  • Gillian M. Lawrence
    • 1
  • Deryck G. Walker
    • 1
  1. 1.Department of BiochemistryUniversity of BirminghamBirminghamUK

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