Article
Metachromatic leukodystrophy: multiple nonfunctional and pseudodeficiency alleles in a pedigree: problems with diagnosis and counseling.
Annals of neurology - 1 Aug 1993
Francis G S, Bonni A, Shen N, Hechtman P, Yamut B, Carpenter S, Karpati G, Chang P L
Abstract excerpt
Metachromatic leukodystrophy is due to deficient activity of arylsulfatase A, an enzyme important in myelin catabolism. The deficiency can be caused by different point mutations in the gene coding for arylsulfatase A (nonfunctional alleles). In addition, certain mutations result in low levels of enzyme activity detectable with artificial substrates in vitro but no clinical dysfunction (pseudodeficiency alleles)....
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