Ornithine carbamoyltransferase; also known as carbamoylphosphate:L-ornithine carbamoyltransferase; catalyzes the biosynthesis of the arginine precursor citrulline; localizes to the cytosol;  human ortholog OTC complements the arginine auxotrophy of the yeast null mutant; hypomorphic variants in human OTC are associated with late-onset ornithine transcarbamylase deficiency