title: Taq I-generated HLA-DQ alpha polymorphism in Japanese patients with narcolepsy.
abstract: Taq I-generated HLA-DQ alpha restriction fragment length polymorphism was examined in Japanese patients with narcolepsy. All patients were DR2 positive and shared a 6.0 kb fragment, although this fragment was found only in 54% of the healthy DR2-positive Japanese. This finding added the DQ alpha gene to the list of candidates for the possible narcolepsy-susceptibility gene. In contrast, there was no complete association between narcolepsy and DX alpha restriction fragment length polymorphism. These findings suggest that a narcolepsy-susceptibility gene is located closer to the DQ locus than to the DX locus.
mesh_terms: D002896:Chromosomes, Human, Pair 6; D008040:Genetic Linkage; D006681:HLA-D Antigens / Q000235:genetics*; D006683:HLA-DQ Antigens / Q000235:genetics*; D006801:Humans; D009290:Narcolepsy / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D006681:HLA-D Antigens; D006683:HLA-DQ Antigens