title: Direct analysis of the FMR-1 gene provides an explanation for an exceptional case of a fragile X negative, mentally retarded male in a fragile X family.
authors.affiliation: Molecular Genetics, Greenwood Genetic Center, SC 29646.
authors.forename: J
authors.initials: J
authors.lastname: Tarleton
authors.forename: S
authors.initials: S
authors.lastname: Wong
authors.forename: C
authors.initials: C
authors.lastname: Schwartz
mesh_terms: D002873:Chromosome Fragility; D004247:DNA / Q000032:analysis; D004252:DNA Mutational Analysis; D004262:DNA Restriction Enzymes; D005192:Family Health; D005600:Fragile X Syndrome / Q000235:genetics*; D005784:Gene Amplification; D014644:Genetic Variation; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics; D008297:Male; D009030:Mosaicism; D009154:Mutation; D010375:Pedigree; D012091:Repetitive Sequences, Nucleic Acid
chemical_list: D004247:DNA; D004262:DNA Restriction Enzymes