ornithine
Noun
Meaning
an amino acid that does not occur in proteins but is important in the formation of urea
Source: WordNetSynonyms
Hypernyms
Examples
However, they require compromises in borderline cases; for example, nicotine contains a pyridine fragment from nicotinamide and pyrrolidine part from ornithine Aniszewski, p. 109 and therefore can be assigned to both classes.
In animals, however, the urea cycle derives putrescine from ornithine.
The separate pathways of converting ornithine to putrescine in plants and animals have converged.
The urea cycle (also known as the ornithine cycle) is a cycle of biochemical reactions occurring in many animals that produces urea (( 2 ) 2 ) from ammonia (NH 3 ).