LOCATION OF AN ATAXIA-TELANGIECTASIA GENE TO AN SIMILAR-TO-500-KB INTERVAL ON CHROMOSOME 11Q23.1 - LINKAGE ANALYSIS OF 176 FAMILIES BY AN INTERNATIONAL CONSORTIUM
E. Lange et al., LOCATION OF AN ATAXIA-TELANGIECTASIA GENE TO AN SIMILAR-TO-500-KB INTERVAL ON CHROMOSOME 11Q23.1 - LINKAGE ANALYSIS OF 176 FAMILIES BY AN INTERNATIONAL CONSORTIUM, American journal of human genetics, 57(1), 1995, pp. 112-119
We describe a 20-point linkage analysis map of chromosome 11q22-23 tha
t is based on genotyping 249 families (59 CEPH and 190 A-T). Monte Car
lo linkage analyses of 176 ataxia-telangiectasia (A-T) families locali
zes the major A-T locus to the region between S1819(A4) and S1818(A2).
When seven nonlinking families were excluded from subsequent analyses
, a 2-lod support interval of similar to 500 kb was identified between
S1819(A4) and S1294. No recombinants were observed between A-T and ma
rkers S384, B7, S535, or S1294. Only 17 of the international consortiu
m families have been assigned to complementation groups, The available
evidence favors either a cluster of A-T genes on chromosome 11 or int
ragenic defects in a single gene.