Nonsyndromic X-linked mental retardation: where are the missing mutations?

Abstract excerpt

Analysis of linkage intervals from 125 unrelated families with nonsyndromic X-linked mental retardation (NS-XLMR) has revealed that the respective gene defects are conspicuously clustered in defined regions of the human X-chromosome, with approximately 30% of all mutations being located on the proximal Xp. In 83% of these families, underlying gene defects are not yet known. Our observations should speed up the...

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