Definition of Citrulline

1. Lupus Slideshow Pictures
2. Gallery of Lupus and Image Collection
3. Take the Lupus Quiz

Citrulline: A non-standard amino acid that is not normally present in protein. Citrulline is created in the body as an intermediate in the conversion of the amino acid ornithine to arginine in a metabolic pathway called the urea cycle.

Citrulline was first isolated from watermelon. The term citrulline was coined in 1930 from citrullus, the Latin name of the watermelon.

Need help identifying pills and medications?
Use the pill finder tool on RxList.