Isoenzymes of human phosphofructokinase.

Human liver phosphofructokinase has been isolated in order to obtain antibodies against human liver phosphofructokinase. With the antiserum it could be shown in human liver that two types of phosphofructokinase exist with no subunits in common. Leucocytes, erythrocytes and kidney also possess the liver (L-) type subunit and a small amount of L-type is present in brain. There is no L-type of phosphofructokinase present in muscle and heart tissue.