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first messenger

American  

noun

Biochemistry.
  1. a hormone that triggers a biochemical reaction at a site removed from its release.


Etymology

Origin of first messenger

First recorded in 1975–80

Example Sentences

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The hormone that initiates the signaling pathway is called a first messenger, which activates a second messenger in the cytoplasm, as illustrated in Figure 28.6.

From Textbooks Jun. 9, 2022

The hormone is called a first messenger and the cellular component is called a second messenger.

From Textbooks Jun. 9, 2022

The hormone that initiated the signaling pathway is called a first messenger.

From Textbooks Jun. 9, 2022

The neurotransmitter, referred to as the first messenger, binds to the receptor protein on the extracellular surface of the cell, and the intracellular side of the protein initiates activity of the G protein.

From Textbooks Jun. 19, 2013

He paid little attention to the first messenger.

From World's End A Story in Three Books by Richard Jefferies

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