obsolete xenobiotic glucuronidation https://github.com/geneontology/go-ontology/issues/28506 true phase II metabolism ai GO:0052697 2011-07-27T05:37:50Z OBSOLETE. The modification of a xenobiotic substance by the conjugation of glucuronic acid. The resultant glucuronosides are often much more water-soluble than the xenobiotic precursor, enabling efficient excretion. The reason for obsoletion is that the term represents a molecular function. biological_process