ScienceAugust 25, 2026
trimethylation
try-meth-ul-AY-shun
Definition
A chemical process in which three methyl groups are added to a molecule, often used to modify proteins or DNA to control gene activity.
Etymology
Derived from the prefix 'tri-' (three), the chemical term 'methyl' (referring to the CH3 group), and the suffix '-ation' (denoting a process). It entered scientific terminology to describe specific biochemical modifications in genetics and molecular biology.
In the news
In this study, scientists identified that the protein switch YY1 triggers a specific chemical modification called H3K4 trimethylation on DNA, which helps reprogram capillary cells into new arteries.
Heart capillaries may build natural bypasses for blood flow after heart attacks
Read the full article ↗Medical Xpress