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. 1985 May;37(3):473–481.

Choroideremia is linked to the restriction fragment length polymorphism DXYS1 at XQ13-21.

R L Nussbaum, R A Lewis, J G Lesko, R Ferrell
PMCID: PMC1684597  PMID: 2988333

Abstract

Choroideremia (McK30310), an X-linked hereditary retinal dystrophy, causes night-blindness, progressive peripheral visual field loss, and, ultimately, central blindness in affected males. The location of choroideremia on the X chromosome is unknown. We have used restriction fragment length polymorphisms from the X chromosome to determine the regional localization of choroideremia by linkage analysis in families with this disease. One such polymorphic locus, DXYS1, located on the long arm (Xq) within bands q13-q21, shows no recombination with choroideremia at lod = 5.78. Therefore, with 90% probability, choroideremia maps within 9 centiMorgans (cM) of DXYS1. Another polymorphic locus, DXS11, located within Xq24-q26, also shows no recombination with choroideremia, although at a smaller lod score of 1.54 (90% probability limit theta less than 30 cM). This linkage with DXS11, a marker that is distal to DXYS1, suggests that the locus for choroideremia is also distal to DXYS1 and lies between these two markers in the region Xq13-q24. These results provide regional mapping for the disease that may be useful for prenatal diagnosis and, perhaps ultimately, for isolating the gene locus for choroideremia.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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