Defects of thyroidal hydrogen peroxide generation in congenital hypothyroidism.

Abstract excerpt

Thyroperoxidase-catalyzed iodination of thyroglobulin and subsequent oxidative coupling of iodinated tyrosyl residues to protein-bound iodothyronines are the key reactions in thyroid hormone biosynthesis. Under sufficient iodine supply, both synthesis steps are rate-limited by the availability of hydrogen peroxide (H(2)O(2)), which is required as final electron acceptor. The primary enzyme feeding H(2)O(2) to...

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