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Genomics. 1996 Aug 1;35(3):597-9.

Evidence for genetic heterogeneity in the carbohydrate-deficient glycoprotein syndrome type I (CDG1).

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Center for Human Genetics, University of Leuven, Belgium.


We have analyzed a series of polymorphic markers on chromosome 16p13 in 17 families with carbohydrate-deficient glycoprotein syndrome type I (CDG1). First, linkage to the region between D16S406 and D16S500 is confirmed. The telomeric border of the candidate region is now definitively placed proximal to D16S406 by crossovers observed in 2 families. Second, in 1 family with 2 affected siblings, the disease is not linked to chromosome 16p. Genetic heterogeneity has not been previously reported for CDG1, and this observation has implications for prenatal diagnosis. Third, allelic associations suggest that the disease locus is localized close to D16S414/D16S497. This places the region of interest centromeric of its published localization.

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