The localization of this GluR2 gene to the q32-33 region of
chromosome 4 excludes its candidacy for two neurodegenerative
diseasesm apped by linkage analysis to chromosome 4. Localization
of Huntington’s disease, a disorder for which a glutamatergic
etiology has been postulated (Choi, 199 l), to the p 16.3
region of chromosome 4 (Gusella et al., 1983) excludes GluR2
as a candidate gene. Likewise, facioscapulohumeral muscular
dystrophy, a familial degenerative disorder postulated to be of
neural origin, has been localized to a region telomeric (q35-ter)
to GluR2 on chromosome 4 (Wijmenga et al., 1991).