name GO_0019794 namespace http://purl.org/obo/owl/GO# parent ObsoleteClass 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. label [en] nonprotein amino acid metabolic process