CBS (Cystathionine beta-synthase): CBS is an enzyme crucial for sulfur metabolism, playing a key role in converting homocysteine into cysteine. This process aids in the production of glutathione, an important antioxidant that protects cells from oxidative stress. CBS also takes part in the transsulfuration pathway, which regulates sulfur-containing amino acids and hydrogen sulfide—a signalling molecule involved in various physiological functions. Proper CBS activity is essential for maintaining cellular redox balance, vascular health, and neurotransmitter regulation. Dysregulation of CBS is associated with metabolic disorders such as homocystinuria and cardiovascular diseases.