obsolete regulation of ornithine metabolic process https://github.com/geneontology/go-ontology/issues/31171 true biological_process GO:0090368 OBSOLETE. Any process that modulates the rate, frequency, or extent of the chemical reactions and pathways involving ornithine, an amino acid only rarely found in proteins, but which is important in living organisms as an intermediate in the reactions of the urea cycle and in arginine biosynthesis. 2010-07-12T11:14:12Z The reason for obsoletion is that this term was an unnecessary grouping terms and only 'biosynthetic' or 'catabolic' process should be used. tb Reactome:R-HSA-350562