RT Journal Article SR Electronic T1 Microsomal glucuronidation of a quaternary ammonium compound, 3-hydroxyphenyltrimethylammonium. JF Drug Metabolism and Disposition JO Drug Metab Dispos FD American Society for Pharmacology and Experimental Therapeutics SP 15 OP 18 VO 5 IS 1 A1 Somani, S M A1 Anderson, J H YR 1977 UL http://dmd.aspetjournals.org/content/5/1/15.abstract AB 3-Hydroxyphenyltrimethylammonium (HPTMA) is glucuronidated in vitro by rat liver microsomes supplemented with UDP-glucuronic acid. Little reaction occurred in the postmicrosomal supernatant fraction. Triton X-100 doubled the maximal velocity for the microsomecatalyzed reaction without altering the apparent KM value for HPTMA. This is the first report of glucuronidation of a quaternary ammonium compound in vitro.