Abstract
In rat tissues at least four types of hexokinases can be distinguished by starch gel electrophoresis and chromatography on DEAE-cellulose or calcium hydroxylapatite. Liver contains all four types, while kidney and intestine contain three. Epididymal fat pad, skeletal muscle, heart, and brain each contain two types of hexokinase. Each type of this family of hexokinases is different from each other in certain kinetic and stability properties. The hexokinase types are uniform in properties from tissue to tissue but are present in differing proportions depending on age, stability, and nutritional factors.