because the enzyme molecule is considerably smaller ( mr approximately 142,000-170,000 ) than that of aldehyde dehydrogenases ( ec 1.2.1.3 ) ( greenfield , n. j. , and pietruszko , r. ( 1977 ) biochim . biophys . acta 483 , 35-45 ; mr approximately 220,000 ) and its subunit weight is different ( 70,600 versus approximately 54,000 for e1 and e2 isozymes ) , the enzyme is not an isozyme of aldehyde dehydrogenase previously described .
C0022173
isozymes
C0014442
enzyme