What is one of the main functions of the urea cycle in amino acid metabolism?

The urea cycle plays a critical role in amino acid metabolism by disposing of excess nitrogen, which is produced when amino acids are broken down. During protein catabolism, amino acids lose their amino group, resulting in the formation of ammonia. Ammonia is highly toxic to cells, so it must be converted into a less harmful compound for excretion. The urea cycle facilitates this process by converting ammonia into urea, which is less toxic and can be safely transported in the bloodstream to the kidneys for excretion through urine. This function is essential for maintaining nitrogen balance in the body and preventing the accumulation of toxic nitrogenous waste.