CPS1 (Carbamoyl-phosphate synthase 1): CPS1 is a crucial enzyme in the urea cycle that plays an important role in detoxifying ammonia in the body. It catalyses the formation of carbamoyl phosphate from ammonia and bicarbonate, initiating the process of urea synthesis in the liver. The urea cycle is essential for eliminating excess nitrogen produced from protein and amino acid breakdown, preventing the accumulation of toxic ammonia in the bloodstream. CPS1 activity is tightly regulated to maintain nitrogen balance and avoid hyperammonemia, a condition associated with neurological damage and other serious complications.