TY - JOUR T1 - Enzymatic conjugation and hydrolysis of [18O]isoborneol glucuronide. JF - Drug Metabolism and Disposition JO - Drug Metab Dispos SP - 677 LP - 679 VL - 6 IS - 6 AU - L P Johnson AU - C Fenselau Y1 - 1978/11/01 UR - http://dmd.aspetjournals.org/content/6/6/677.abstract N2 - Introduction of 18O into the acetal linkage of isoborneol glucuronide has been accomplished through the in vitro enzymatic conjugation of 18O-labeled isoborneol by use of immobilized, partially purified, rabbit liver UDP-glucuronyltransferase supplemented with UDP-glucuronic acid. Mass-spectrometric analysis of 18O enrichment in both the aglycon and the intact conjugate made it possible to study both enzymatic conjugation and enzymatic hydrolysis. Analysis by gas chromatography-mass spectrometry indicated that the labeled hydroxyl oxygen of isoborneol is retained during both conjugation and hydrolysis. ER -