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Molecular genetics of spinocerebellar ataxia type 2(SCA) Kazuhiro SANPEI 1 , Shoji TSUJI 1 1Department of Neurology, Brain Research Institute, Niigata University Keyword: SCA2 , DIRECT , CAGリピート , ポリグルタミン , 表現促進現象 pp.375-383
Published Date 1997/6/10
DOI https://doi.org/10.11477/mf.1431900955
  • Abstract
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By applying DIRECT, we have identified an expanded CAG repeat of the gene for SCA2. The CAG repeats of normal alleles range in size from 15 to 24 repeat units and show insertion of one or two CAA elements, while those of SCA2 chromosomes are expanded to 35 to 59 repeat units and contain no interruptions. SCA2 is similar to other CAG repeat diseases in many aspects as evidenced by ; ( i ) inverse correlation of the size of expanded CAG repeats with age at onset, (ii) paternal transmission resulting in a potentially larger intergenerational increase in the CAG repeat size then maternal transmission, ( iii) genetic anticipation,


Copyright © 1997, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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