repressor

noun
re·​pres·​sor | \ ri-ˈpre-sər How to pronounce repressor (audio) \

Definition of repressor

: one that represses especially : a protein that is determined by a regulatory gene, binds to a genetic operator, and inhibits the initiation of transcription of messenger RNA

Examples of repressor in a Sentence

Recent Examples on the Web Netanyahu is on trial for corruption and heads a state that is widely seen as a repressor of Palestinian rights. Tracy Wilkinson Staff Writer, Los Angeles Times, 26 May 2021 The researchers enhanced this silencing effect by hitching Cas9 to a repressor, another protein that inhibits gene expression. Kelly Servick, Science | AAAS, 10 Mar. 2021 But no one had identified a full activator-repressor system involved in periodic pigmentation patterns. Elizabeth Pennisi, Science | AAAS, 29 Aug. 2019 The cycle at the center of it—from gene activators to repressors and back—is highly regulated. John Timmer, Ars Technica, 2 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'repressor.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of repressor

1584, in the meaning defined above

History and Etymology for repressor

New Latin

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Time Traveler for repressor

Time Traveler

The first known use of repressor was in 1584

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Dictionary Entries Near repressor

repression

repressor

repressure

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Cite this Entry

“Repressor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/repressor. Accessed 28 Sep. 2021.

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More Definitions for repressor

repressor

noun
re·​pres·​sor | \ ri-ˈpres-ər How to pronounce repressor (audio) \

Medical Definition of repressor

: one that represses especially : a protein that is determined by a regulatory gene, binds to a genetic operator, and inhibits the initiation of transcription of messenger RNA

More from Merriam-Webster on repressor

Britannica.com: Encyclopedia article about repressor

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