epitope

noun

epi·​tope ˈe-pə-ˌtōp How to pronounce epitope (audio)
: a molecular region on the surface of an antigen capable of eliciting an immune response and of combining with the specific antibody produced by such a response

called also determinant, antigenic determinant

Examples of epitope in a Sentence

Recent Examples on the Web The combination of gradually falling levels of antibodies plus reduced epitope recognition has led to breakthrough infections, but the immune response has been sufficient to prevent severe disease, especially when it has been boosted. John Timmer, Ars Technica, 13 Jan. 2022 The figure below compares the binding epitope of 12-19 to other neutralizing antibody epitopes from throughout the pandemic. William A. Haseltine, Forbes, 18 Apr. 2023 If, because of past infection or vaccination, most people in a population have antibodies that recognize a specific epitope, then a change that alters the epitope and limits that recognition can allow the mutant virus to infect the population. John Timmer, Ars Technica, 13 Jan. 2022 All 32 antibodies competed strongly for similar S2 stem-helix epitopes, targeting a similar region containing the hydrophobic core residues of the spike fusion machinery. William A. Haseltine, Forbes, 17 Mar. 2023 The epitope previously described is highly conserved across betacoronaviruses. William A. Haseltine, Forbes, 17 Mar. 2023 Researchers analyze the sample in a lab to identify antigens and epitopes associated with various diseases. Laura Hensley, Verywell Health, 6 Mar. 2023 More detailed analysis, including binding to an isolated peptide corresponding to this region, reveals that the antibody recognizes a linear epitope. William A. Haseltine, Forbes, 23 Dec. 2021 B cells respond most strongly when each arm attaches to a different epitope. Jon Cohen, Science | AAAS, 15 Apr. 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'epitope.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

epi- + Greek tópos "place"

Note: Term introduced by the Danish immunologist Niels Kaj Jerne (1911-94) in "Immunological speculations," Annual Review of Microbiology, vol. 14 (1960), pp. 341-58.

First Known Use

1960, in the meaning defined above

Time Traveler
The first known use of epitope was in 1960

Dictionary Entries Near epitope

Cite this Entry

“Epitope.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/epitope. Accessed 18 Apr. 2024.

Medical Definition

epitope

noun
epi·​tope ˈep-ə-ˌtōp How to pronounce epitope (audio)
: a molecular region on the surface of an antigen capable of eliciting an immune response and of combining with the specific antibody produced by such a response

called also determinant, antigenic determinant

More from Merriam-Webster on epitope

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