求胺基酸轉化為尿素既化學方程﹖

Overall energy requirement:

NH3 + CO2 + Aspartate + 3 ATP + 2 H2O → urea + Fumarate + 2 ADP + 4 Pi + AMP
Overall equation of the urea cycle:

2 NH3 + CO2 + 3 ATP + H2O → urea + 2 ADP + 4 Pi + AMP + 2 H

工業用

Two principal reactions take place in the formation of urea from ammonia and carbon dioxide. The first reaction is exothermic:

2 NH3 + CO2 ↔ H2N-COONH4 (ammonium carbamate)

Whereas the second reaction is endothermic:

H2N-COONH4 ↔ (NH2)2CO + H2O