title: Expression of the fragile site Xq27 in fibroblasts. I. Detection of fra(X)(q27) in fibroblast clones from males with X-linked mental retardation.
abstract: Twelve fibroblast clones from two males with X-linked mental retardation expressed the fragile site Xq27 in 3%-38% of metaphases analyzed. The number of in vitro doublings during the cloning procedure had no evident influence on the induction of fragile X expression. The variability of fragile X expression seems to depend on cell properties acquired during culture rather than on properties originally inherent in the cells.
mesh_terms: D043283:Chromosome Fragile Sites; D002873:Chromosome Fragility; D002999:Clone Cells; D005260:Female; D005347:Fibroblasts / Q000648:ultrastructure; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D012729:Sex Chromosome Aberrations / Q000235:genetics*; D014960:X Chromosome / Q000648:ultrastructure