The enzyme defect in maple syrup urine disease and in its varient form, intermittent branched-chain ketonuria, is demonstrable in skin fibroblast cultures derived from patients with this disease. In both instances there is considerable reduction in the ability to decarboxylate all three branched-chain keto acids. In view of the recent evidence that there are two or three branched-chain decarboxylases, each with a specific substrate, it is suggested that one gene controls the synthesis of a polypeptide that is common to the involved enzymes or to some structural or regulatory part of the enzyme complex.
|Original language||English (US)|
|Number of pages||5|
|Publication status||Published - Apr 1969|
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