treatment of the heavy form with bromelain yields a light form of the enzyme ( molecular weight of approximately 68,000 ) , which is separable by isoelectric focusing into 12 enzymatically active isozymes which are very similar with respect to catalytic behavior , content of amino acids , hexoses , and aminohexoses , but which differ significantly in sialic acid content .
C0014442
enzyme
C0022173
isozymes