CBS (Cystathionine beta-synthase): CBS is an enzyme essential for sulfur metabolism, playing a key role in converting homocysteine to cysteine. This process supports the production of glutathione, an important antioxidant for protecting cells against oxidative stress. CBS also participates in the transsulfuration pathway, which regulates sulfur-containing amino acids and hydrogen sulfide, a signaling molecule involved in various physiological functions. Proper CBS activity is important for maintaining cellular redox balance, vascular function, and neurotransmitter regulation. Dysregulation of CBS is linked to metabolic disorders such as homocystinuria and cardiovascular diseases.