Citrulline
see also: Etymology of Citrulline
The Citrulline is an Amino-acid . This amino-acid is not coded by the genetic Code in the DNA. For this reason, it does not enter the composition of the Protéine S. It is the principal product of the action of the ornithin transcarbamylase (OTC) which carries out the condensation of ornithin and the carbamylphosphate. See the article in connection with the Cycle of the urea.