methylation: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “methylation” mean?
The addition of a methyl group (-CH₃) to a molecule.
Audio
Pronunciation
Definition
Meaning and Definition
The addition of a methyl group (-CH₃) to a molecule.
In biology and chemistry, it refers to a specific biochemical process where a methyl group is transferred to another molecule, most famously to DNA or proteins, often modifying their function. In epigenetics, it is a crucial mechanism for gene regulation.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or pronunciation differences. Usage is identical in technical contexts.
Connotations
Identical technical connotations.
Frequency
Extremely rare in general discourse in both varieties. Frequency is limited almost exclusively to scientific literature, with identical distribution.
Grammar
How to Use “methylation” in a Sentence
The methylation of [DNA/histones/proteins] by [an enzyme][DNA/histones/proteins] undergo methylation[Substance] leads to/inhibits methylationVocabulary
Collocations
Examples
Examples of “methylation” in a Sentence
verb
British English
- The enzyme methylates the cytosine residue.
- Researchers sought to methylate the compound synthetically.
American English
- The protein methylates the histone tail.
- They used a catalyst to methylate the substrate.
adjective
British English
- The methylated cytosine was easily detected.
- They studied methylated DNA regions.
American English
- The methylated compound behaved differently.
- They analyzed methylated histones.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Core term in epigenetics, biochemistry, molecular biology, and pharmacology.
Everyday
Extremely rare; would only appear in popular science articles about genetics or health.
Technical
Precise term for a specific biochemical modification. Used in research papers, lab protocols, and scientific discussions.
Vocabulary
Synonyms of “methylation”
Weak
Vocabulary
Antonyms of “methylation”
Watch out
Common Mistakes When Using “methylation”
- Mispronouncing as /miːθaɪˈleɪʃən/ or /mɛθaɪˈleɪʃən/. The 'y' is pronounced as a short 'i' /ɪ/.
- Using 'methylation' to refer to any chemical modification; it is specific to methyl groups.
- Confusing 'hypermethylation' (too much) and 'hypomethylation' (too little).
FAQ
Frequently Asked Questions
It is a normal, essential biological process. Both abnormal increases (hypermethylation) and decreases (hypomethylation) can be linked to diseases like cancer.
Yes, through a process called demethylation, which can be passive (during DNA replication) or active (enzymatically driven).
Genetic changes alter the DNA sequence (e.g., mutations). Epigenetic changes, like methylation, modify how genes are read without changing the sequence itself.
No. While DNA methylation is the most discussed, proteins (especially histones) and other molecules can also be methylated, which affects their function.
The addition of a methyl group (-CH₃) to a molecule.
Methylation is usually technical/scientific in register.
Methylation: in British English it is pronounced /ˌmɛθɪˈleɪʃ(ə)n/, and in American English it is pronounced /ˌmɛθəˈleɪʃən/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: METHYLation - adding a METHYL group. Link 'methyl' to 'methane' (CH₄), a simple carbon compound.
Conceptual Metaphor
A chemical 'tag' or 'mark' that acts like an on/off switch or a volume knob for genes.
Practice
Quiz
In epigenetics, what is the primary role of DNA methylation?