Glucosephosphate isomerase (GPI-1) expression in mouse ova: cis regulation of monomer realization

A survey of the glucosephosphate isomerase (GPI-1) activity expressed in mature mouse ova has revealed multiple interstrain differences. Genetic variation at a site either linked to (less than 1.1 cM) or directly associated with Gpi-1 affects the realization of GPI-1 monomers during the later stages of oocyte maturation.