Update on enzyme and molecular defects in porphyria.

Abstract excerpt

Each porphyria results from decreased activity of one of the enzymes of haem biosynthesis. The molecular basis of enzyme deficiencies in acute intermittent porphyria (AIP), variegate porphyria (VP) and congenital erythropoietic porphyria (CEP) is outlined. All three conditions show extensive allelic heterogeneity. In the autosomal dominant disorders, AIP and VP, no genotype/phenotype correlations have been...

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