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New Data Do Not Suggest Linkage Between the Xg Blood Group and Bipolar Illness
James F. Leckman, MD;
Elliot S. Gershon, MD;
Mary H. McGinniss;
Steven D. Targum, MD;
Eleanor D. Dibble, DSW
Arch Gen Psychiatry. 1979;36(13):1435-1441.
Abstract
• The Xg blood group antigen (a genetic marker of a region of the X chromosome at a considerable distance from protan/ deutan color blindness) was studied for linkage to bipolar manic-depressive illness. A multigenerational analytic method, taking variable penetrance into account, was used. In our series of six informative pedigrees, very close linkage could be definitively ruled out, and the likelihood of less tight linkage was consistently less than the likelihood of nonlinkage.
Author Affiliations
From the Section on Psychogenetics, Biological Psychiatry Branch, National Institute of Mental Health, Bethesda, Md.
Footnotes
Accepted for publication June 29, 1979.
Reprint requests to Section on Psychogenetics, BPB, National Institute of Mental Health, Bldg 10, Room 3N218, 9000 Rockville Pike, Bethesda, MD 20205 (Dr Gershon).
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