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  • Title: Characterization of new PCR based markers for mapping and diagnosis: AC dinucleotide repeat markers at the DXS237 (GMGX9) and DXS102 (cX38.1) loci.
    Author: Gedeon AK, Holman K, Richards RI, Mulley JC.
    Journal: Am J Med Genet; ; 43(1-2):255-60. PubMed ID: 1351362.
    Abstract:
    Genomic insert DNAs from 45 probes representing 113.4 kb of the X chromosome were screened for AC dinucleotide repeat sequence. Two new AC repeat sequences were identified with length polymorphism based on variation in repeat copy number. One at DXS237 exhibits 44% heterozygosity and is potentially useful for rapid diagnosis and mapping of X-linked disorders in Xp22.3. The other, at DXS102 in Xq26, has 71% heterozygosity. This marker will improve accuracy of diagnoses by linkage for families with Börjeson-Forssman-Lehmann syndrome. Review of the literature has identified 31 PCR based markers on the X chromosome, with minimum heterozygosity of 50%, applicable to the mapping and diagnosis of X-linked disorders.
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