The two nitrogen atoms that are incorporated into the urea cycle. The source of the nitrogen is
Two nitrogen atoms of urea are derived from two different sources, one from ammonia and the other directly from alpha amino group of aspaic acid.Ref: DM Vasudevan - Textbook of Biochemistry, 6th edition, page no: 203
Glutamate & Aspaate
Aspaate & Arginine
Aspaate & NH3
Glutamate & NH3
Metabolism of protein and amino acid