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Updated: Jan 28, 2026

Methyl-binding DNA capture Sequencing for Patient Tissues
Published on: October 31, 2016
Linkage studies exclude the AT-V gene(s) from the translocation breakpoints in an AT-V patient
K Chrzanowska1, M Stumm, M Bialecka
1Department of Genetics, The Children's Memorial Health Institute, Warsaw, Poland.
Abstract:
An 8-year-old girl with severe microcephaly of prenatal onset, borderline intelligence, defects of skin pigmentation, deficiency of both humoral and cellular immunity, a normal serum alpha-fetoprotein level and hypersensitivity to ionizing irradiation is described. Spontaneous chromosomal breakage in lymphocytes together with the clinical presentation led to the diagnosis of ataxia telangiectasia variant (AT-V). In addition, the patient carried a constitutional translocation of paternal origin: 46,XX,t(3;7)(q12;q31.3) pat. In subsequent linkage and haplotype studies in 12 AT-V families with microsatellite markers from each of the translocation breakpoint regions, we could clearly exclude the localization of an AT-V gene to these regions.
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