Two families with nonspecific X-linked mental retardation (XLMR) are presented. In the first family, MRX49, 5 male patients in 2 generations showed mild to moderate mental retardation. Two-point linkage analysis with 28 polymorphic markers, dispersed over the X-chromosome, yielded a maximal LOD scor
Localization of two X-linked mental retardation (XLMR) genes to Xp: MRX37 gene at Xp22.31-p22.32 and a putative MRX gene on Xp22.11-p22.2
β Scribed by Bar-David, Shirly ;Lerer, Israela ;Sarfaty, Chava Kimchi ;Kohan, Zully Gelman ;Meiner, Vardiella ;Zlotogora, Joel ;Abeliovich, Dvorah
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 527 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0148-7299
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β¦ Synopsis
MRX genes of 2 families with X-linked mental retardation (XLMR) were localized by linkage analysis. In family A, the gene was mapped to Xp22.31-p22.32, with significant LOD scores to various Xp22 markers within a distance of 6 Mb between DXS1223 and DXS1224. The MRX gene of this family was designated MRX37. In a mentally retarded female who is a carrier of the MRX37 gene, a random pattern of X inactivation was demonstrated. In family B, a positive LOD score, although not significant (<+2), was found with the marker DXS1202 at Xp22.11-p22.2.
π SIMILAR VOLUMES
A gene responsible for X-linked mental retardation with macrocephaly and seizures (MRX38) in a family with five affected males in three generations was localized to Xp21.1-p22.13 by linkage analysis. Recombination events placed the gene between DXS1226 distally and DXS1238 proximally, defining an in
## Linkage analysis was performed on a fourgeneration family with nonspecific mental retardation (MRX59 ). The five affected males, ranging in age from 2 years to 52 years, have a normal facial appearance and mild to severe mental impairment. Four obligate carriers are physically normal and not ret