Liver pyruvate kinase (PK) isozymes in a PK‐deficient patient*

SUMMARY Liver from a patient with hereditary haemolytic anaemia due to pyruvate kinase deficiency is a deficient in the ‘erythrocyte’ PK isozyme as are her erythrocytes. The chromatographic, electrophoretic, antigenic, heat stability and kinetic properties of the patient's enzyme were not different from normal.