Citrulline ni L-enantiomer ya citrulline.Ifite uruhare nka EC 1.14.13.39 (nitric oxide synthase) inhibitor, imiti ikingira, intungamubiri, micronutrient, metabolite yumuntu, metabolite ya Escherichia coli metabolite, Saccharomyces cerevisiae metabolite na metabolite yimbeba.Ni enantiomer ya D-citrulline.Ni tautomer ya L-citrulline zwitterion.