We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Article |

X-Chromosome Markers in Bipolar Illness-Reply

Elliot S. Gershon, MD
Arch Gen Psychiatry. 1981;38(6):719-720. doi:10.1001/archpsyc.1981.01780310119014.
Text Size: A A A
Published online


It is not unheard of in the history of science that two sets of observations are incompatible and that eventually only one set proves replicable. This may be the case with X-chromosome markers in bipolar illness. Although my friend and colleague Professor Mendlewicz is puzzled at my letter, it offered a fair presentation of the current status of the controversy in this area. The first problem, inconsistency of the Xg antigen and color blindness linkage to the same marker, is no longer a subject of controversy as a result of the work of Mohandas et al,1 which clearly links Xg to steroid sulfatase on the short arm of the X chromosome, whereas protan and deutan color blindness and G6PD are in a small region on the distal end of the long arm of that chromosome.

The second problem is that the strikingly and consistently positive linkage series of color


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

First Page Preview

View Large
First page PDF preview





Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.


Some tools below are only available to our subscribers or users with an online account.

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.