Citrulline is the L-enantiomer of citrulline.Munus habet ut EC 1.14.13.39 (Synthasis oxydi nitrici) inhibitoris, agentis tutelae, nutraceuticae, micronutrientis, metabolitae humani, coli metabolitae Escherichiae, metabolitae saccharomyces cerevisiae et metabolitae mus.Est enantiomer of a D-citrulline.tautomer of a L-citrulline zwitterion.