A guide to fragile sites on human chromosomes. 1990

F Hecht, and K H Ramesh, and D H Lockwood
Southwest Biomedical Research Institute, Scottsdale, Arizona 85251.

This is a guide to 107 fragile sites, all those considered at the most recent International Workshop on Human Gene Mapping, HGM 9.5, held in 1988. The chromosome band locations of all 107 fragile sites are given, together with their gene symbols, frequency, mode of induction, and status. The majority of these fragile sites are common ones induced to expression by aphidicolin. Fragile sites are nonrandomly distributed within the genome. Chromosome 3 is especially short of known fragile sites. Chromosome 21, the chromosome triplicated in Down syndrome, has no known fragile sites.

UI MeSH Term Description Entries
D002873 Chromosome Fragility Susceptibility of chromosomes to breakage leading to translocation; CHROMOSOME INVERSION; SEQUENCE DELETION; or other CHROMOSOME BREAKAGE related aberrations. Chromosomal Fragility,Fragility, Chromosomal,Fragility, Chromosome
D002874 Chromosome Mapping Any method used for determining the location of and relative distances between genes on a chromosome. Gene Mapping,Linkage Mapping,Genome Mapping,Chromosome Mappings,Gene Mappings,Genome Mappings,Linkage Mappings,Mapping, Chromosome,Mapping, Gene,Mapping, Genome,Mapping, Linkage,Mappings, Chromosome,Mappings, Gene,Mappings, Genome,Mappings, Linkage
D004224 Diterpenes Twenty-carbon compounds derived from MEVALONIC ACID or deoxyxylulose phosphate. Diterpene,Diterpenes, Cembrane,Diterpenes, Labdane,Diterpenoid,Labdane Diterpene,Norditerpene,Norditerpenes,Norditerpenoid,Cembranes,Diterpenoids,Labdanes,Norditerpenoids,Cembrane Diterpenes,Diterpene, Labdane,Labdane Diterpenes
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D016590 Aphidicolin An antiviral antibiotic produced by Cephalosporium aphidicola and other fungi. It inhibits the growth of eukaryotic cells and certain animal viruses by selectively inhibiting the cellular replication of DNA polymerase II or the viral-induced DNA polymerases. The drug may be useful for controlling excessive cell proliferation in patients with cancer, psoriasis or other dermatitis with little or no adverse effect upon non-multiplying cells. Aphidicolin, (3-S-(3alpha,4beta,4abeta,6aalpha,8alpha,9alpha,11aalpha,11balpha))-Isomer,ICI-69653,NSC-234714,NSC-351140,ICI 69653,ICI69653,NSC 234714,NSC 351140,NSC234714,NSC351140
D043283 Chromosome Fragile Sites Specific loci that show up during KARYOTYPING as a gap (an uncondensed stretch in closer views) on a CHROMATID arm after culturing cells under specific conditions. These sites are associated with an increase in CHROMOSOME FRAGILITY. They are classified as common or rare, and by the specific culture conditions under which they develop. Fragile site loci are named by the letters "FRA" followed by a designation for the specific chromosome, and a letter which refers to which fragile site of that chromosome (e.g. FRAXA refers to fragile site A on the X chromosome. It is a rare, folic acid-sensitive fragile site associated with FRAGILE X SYNDROME.) Fragile Sites, Chromosome,Chromosome Fragile Site,Fragile Site, Chromosome,Site, Chromosome Fragile,Sites, Chromosome Fragile

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