The molecule is zwitterionic form of L-citrulline having an anionic carboxy group and a protonated amino group; major species at pH 7.3. It has a role as a human metabolite, an Escherichia coli metabolite, a plant metabolite and a Daphnia magna metabolite. It is a tautomer of a L-citrulline.
(2S)-2-azaniumyl-5-(carbamoylamino)pentanoate