D gene
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  D gene

D gene

    A small segment of immunoglobulin heavy-chain and T-cell receptor DNA, coding for the third hypervariable region of most receptors.


A serum protein involved in immunity. An antibody.

A white blood cell concerned with immunity. It does not produce antibodies.

A molecule that recognizes a unique hormone. Once that hormone is bound to the receptor, the information carried by the hormone can now exert its biological action.

Deoxyribo-Nucleic acid. DNA molecules carry the genetic information necessary for the organization and functioning of most living cells and control the inheritance of characteristics.

Areas on the outer part of a cell that allow the cell to join or bind with insulin that is in the blood.



Passage of excessively liquid or excessively frequent stools.

Drug treatment
A treatment with one or more drugs to fight a given condition or disease. Also, a treatment against drug addiction.

A cognitive disorder marked by an impaired ability to comprehend or express language in its written or spoken form. This condition is caused by diseases which affect the language areas of the dominant hemisphere. Clinical features are used to classify the various subtypes of this condition. General categories include receptive, expressive, and mixed forms of aphasia.

Drug treatment center
A specific center, clinic or institution where drug addiction patients are treated against their addiction.

Depression treatment
A combination of several medical actions, interventions and prescriptions aimed at tackling a patient's depression condition.

D gene

Delayed type hypersensitivity (DTH)
A T cell-mediated reaction to antigen, which takes 24-48 hours to develop fully, and which involves release of lymphokines and recruitment of monocytes and macrophages. Also called c cell-mediated immunity.

Part of the antigen molecule which binds to an antibody-combining site or to a receptor on T cells (see hapten and epitope).

Differentiation antigen
A cell surface antigenic determinant found only on cells of a certain lineage and at a particular developmental stage; used as an immunologic marker.

compact segment of an immunoglobulin molecule, made up of about 110 amino acids around an S-S bond, and encoded by a unique segment of DNA, surrounded by nontranslated sequences.

DR antigens
MHC class II molecules found on B cells and antigen-presenting cells of humans.

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