met enkephalin: meaning, definition, pronunciation and examples
C2 (Very Low)Exclusively Technical/Scientific
Quick answer
What does “met enkephalin” mean?
A specific, naturally occurring pentapeptide (Tyr-Gly-Gly-Phe-Met) found in the brain and other tissues that functions as an endogenous opioid neurotransmitter, acting primarily on delta opioid receptors to modulate pain perception and emotional responses.
Audio
Pronunciation
Definition
Meaning and Definition
A specific, naturally occurring pentapeptide (Tyr-Gly-Gly-Phe-Met) found in the brain and other tissues that functions as an endogenous opioid neurotransmitter, acting primarily on delta opioid receptors to modulate pain perception and emotional responses.
One of the two major endogenous enkephalins (the other being leu-enkephalin), it is cleaved from the precursor protein proenkephalin and functions as a neuropeptide with roles in analgesia, reward, stress response, and gastrointestinal motility. It is often discussed in contrast to exogenous opioid drugs.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or orthographic differences. Pronunciations may vary slightly (see IPA).
Connotations
Identical scientific/medical connotations in both variants.
Frequency
Extremely low frequency in general language, identical and exclusive to specialized biomedical literature in both regions.
Grammar
How to Use “met enkephalin” in a Sentence
Met-enkephalin [verb]...The action/effect of met-enkephalin...Met-enkephalin levels/concentrations...Vocabulary
Collocations
Examples
Examples of “met enkephalin” in a Sentence
adjective
British English
- The met-enkephalin pathway was investigated.
- Met-enkephalin-containing neurons were stained.
American English
- The met-enkephalin pathway was investigated.
- Met-enkephalin-containing neurons were stained.
Usage
Meaning in Context
Business
Not used.
Academic
Used extensively in neuroscience, pharmacology, physiology, and biochemistry research papers and textbooks.
Everyday
Never used.
Technical
Core term in medical and biological sciences, specifically in discussions of endogenous pain control systems, neurochemistry, and psychopharmacology.
Vocabulary
Synonyms of “met enkephalin”
Neutral
Weak
Vocabulary
Antonyms of “met enkephalin”
Watch out
Common Mistakes When Using “met enkephalin”
- Misspelling as 'mettenkephalin' or 'met enkephalin' (without hyphen).
- Using it as a countable noun (e.g., 'a met-enkephalin'); it is generally non-count.
- Confusing it with β-endorphin or dynorphin, other classes of endogenous opioids.
FAQ
Frequently Asked Questions
No, it is not a manufactured pharmaceutical drug. It is a naturally occurring substance (an endogenous peptide) produced by the body's own neurons.
They differ by one amino acid at their C-terminus. Met-enkephalin ends in methionine (Tyr-Gly-Gly-Phe-Met), while leu-enkephalin ends in leucine (Tyr-Gly-Gly-Phe-Leu). This small difference affects their receptor binding preferences and stability.
No, it cannot be taken orally or by injection in its natural form because it is broken down too quickly in the bloodstream and cannot cross the blood-brain barrier effectively. Drug research focuses on creating stable analogs that mimic its action.
It is primarily synthesized and released by specific neurons in the central nervous system (e.g., in the basal ganglia, amygdala, and spinal cord) and in some cells of the adrenal medulla and gastrointestinal tract.
A specific, naturally occurring pentapeptide (Tyr-Gly-Gly-Phe-Met) found in the brain and other tissues that functions as an endogenous opioid neurotransmitter, acting primarily on delta opioid receptors to modulate pain perception and emotional responses.
Met enkephalin is usually exclusively technical/scientific in register.
Met enkephalin: in British English it is pronounced /ˌmɛt ɛnˈkɛfəlɪn/, and in American English it is pronounced /ˌmɛt ɛnˈkɛfəlɪn/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
MET-enkephalin helps you manage pain, like a chemical safety NET. (Links 'met' to 'net' and function).
Conceptual Metaphor
THE BODY'S BUILT-IN PAINKILLER; A KEY FOR THE BODY'S OWN OPIOID LOCKS.
Practice
Quiz
What is the primary functional role of met-enkephalin?