HealthAugust 10, 2026
cysteine
SIS-teen
Definition
A sulfur-containing amino acid that plays a critical role in protein structure and metabolic regulation within cells.
Etymology
The term was coined in 1899 from the Greek word 'kystis' (bladder or cyst), as it was originally isolated from bladder stones.
In the news
The article discusses how metabolic processes modify cysteine residues in proteins, highlighting how this amino acid acts as a sensor that helps cancer cells adapt to their environment.
Mapping how metabolism rewires protein function in cancer
Read the full article ↗EurekAlert!