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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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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 that initiated the signaling pathway is called a first messenger.

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

In this case, the hormone is called a first messenger.

From Textbooks • Jun. 19, 2013

Strange! they said I should receive some further instructions by the first messenger.

From Tony Butler by Lever, Charles James