a substance has been purified to apparent homogeneity from rat liver which , as previously reported ( dunaway , g. a. , jr. , and segal , h. l. ( 1974 ) biochem . biophys . res . commun . 56 , 689-696 ) , specifically stabilizes the major liver isozyme of phosphofructokinase ( pfk-l2 ) against thermal inactivation and whose level in vivo changes in parallel with and in precedence to that of the enzyme .
C0022173
isozyme
C0014442
enzyme