name GO_0019796 namespace http://purl.org/obo/owl/GO# parent ObsoleteClass label [en] nonprotein amino acid catabolic process hasOBONamespace [] biological_process comment [] This term was made obsolete because it was a grouping term that was poorly defined and did not provide a particularly meaningful grouping, since even for those amino acids commonly found in proteins, not all molecules necessarily end up incorporated into proteins. The term also violated the principle of positivity.