Source:http://linkedlifedata.com/resource/umls/id/C1518591
GO: Interacting selectively and non-covalently with an opioid receptor. [GOC:nln],NCI: A process that involves the non-covalent binding of opioids to one of four opioid receptors. These interactions are involved in mediation of analgesia, euphoria, and physical dependence to opioids.