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• Immunology Terms

- E -

• Enhancing antibodies

Antibodies which enhance the survival of a graft or of a tumor.



• Enzyme-linked immunosorbent assay (ELISA)

An assay in which an enzyme is linked to an antibody and a colored 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

In a precipitin reaction, the region in which the concentration of antigen and antibody leads to maximal precipitation.



• Exon

The region of DNA coding for a protein or a segment of a protein.