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Equivalence zone
Equivalence zone In a precipitin reaction, the region in which the concentration of antigen and antibody leads to maximal precipitation.
RELATED TERMS--------------------------------------
Antigen
A substance which, when present in animal tissue, stimulates the production of antibodies
Antibody
An infection-fighting protein molecule in blood or secretory fluids that tags, neutralizes, and helps destroy pathogenic microorganisms (eg, bacteria, viruses) or toxins. Antibodies, known generally as immunoglobulins, are made and secreted by B-lymphocytes in response to stimulation by antigens. Each specific antibody binds only to the specific antigen that stimulated its production.
SIMILAR TERMS--------------------------------------
Equilibrium disorders
Balance disorders.
Equiluminant stimuli
Visual stimuli that vary only in color but not in luminance. Stereopsis and motion perception disappear at equiluminance indicating the presence of separate processing channels for color, motion and stereopsis.
Equinophobia
An abnormal and persistent fear of horses. Sufferers of equinophobia experience undue anxiety even when a horse is known to be gentle and well trained. They usually avoid horses entirely rather than risk being kicked, bitten or thrown. They may also fear other hoofed animals such as ponies, donkeys and mules.
Equipin
Equipin is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): homatropine methylbromide.
Equipoise
A state in which an investigator is uncertain about which arm of a clinical trial would be therapeutically superior for a patient. An investigator who has a treatment preference or finds out that one arm of a comparative trial offers a clinically therapeutic advantage should disclose this information to subjects participating in the trial. Ethically, subjects should only be entered or continue in a trial where equipoise exists for that subject.
Equivalence trial
A trial with the primary objective of showing that the response to two or more treatments differs by an amount which is clinically unimportant. This is usually demonstrated by showing that the true treatment difference is likely to lie between a lower and an upper equivalence level of clinically acceptable differences.
PREVIOUS AND NEXT TERMS--------------------------------------
Enchancing antibodies
Antibodies which enhance the survival of a graft or of a tumour.
Enzyme-linked immunosorbent assay (ELISA)
An assay in which an enzyme is linked to an antibody and a coloured substrate is used to measure the activity of bound enzyme and, hence, the amount of bound antibody.
Eosinophil
A polymorphonuclear leukocyte with large eosinophilic (i.e. red) cytoplasmic granules.
Eosinophil chemotactic factor of anaphylaxis (ECF-A)
A substrate released from mast cells during anaphylaxis which attracts eosinophils.
Epitope
An alternative term for antigenic determinant.
Equivalence zone
Exon
The region of DNA coding for a protein or a segment of a protein.
Effeminate
A womanish or sissyish manner and bearing in a man or boy stigmatized as an unmanly homosexual.
Ego dystonic
In psychiatry, the term used to apply to a proclivity, for example, toward homosexuality, in a person who seeks to repudiate it.
Eidetic
Characterized by vividly precise and accurate recall of objects, events, sounds or other imagery previously perceived.
Elective mutism
Failure to speak, or to be able to speak about certain topics, that is not necessarily permanent but is reversible under changed circumstances.
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