negatively regulates L-ornithine catabolic process negative regulation of catabolic process negative regulation of amino acid metabolic process negative regulation of small molecule metabolic process biological regulation regulation of ornithine catabolic process negative regulation of ornithine catabolic process down regulation of ornithine catabolic process down-regulation of ornithine breakdown inhibition of ornithine degradation bhm down regulation of ornithine degradation down regulation of ornithine breakdown An example of this is ARGI in Saccharomyces cerevisiae (P00812) in PMID:12679340 (inferred from direct assay). negative regulation of ornithine degradation inhibition of ornithine catabolic process biological_process negative regulation of ornithine breakdown 2014-08-08T08:29:42Z negative regulation of ornithine catabolism down-regulation of ornithine degradation inhibition of ornithine breakdown downregulation of ornithine breakdown downregulation of ornithine catabolism down-regulation of ornithine catabolic process downregulation of ornithine degradation inhibition of ornithine catabolism down-regulation of ornithine catabolism GO:1903267 down regulation of ornithine catabolism Any process that stops, prevents or reduces the frequency, rate or extent of ornithine catabolic process. downregulation of ornithine catabolic process