protein complexed with microsomal, but not lysosomal, beta-glucuronidase, e.g., endoplasmic glucuronidase; syn- from Greek root ''to hold together''; membrane-associated glycoprotein which stabilizes membrane binding of glucuronidase; member of a group of liver carboxyl esterases, which hydrolyze palmitoyl-CoA, palmitoylcarnitine, monoglycerides, and lysophospholipids
