3748817 mPGES-1 microsomal prostaglandin E synthase-1 474 3748828 mPGES1 microsomal PGE synthase 1 11 3748830 mPGES1 membrane-bound PGE synthase 1 2 3748831 mPGES1 microsomal PGES1 2 3748829 mPGES1 microsomal 17 kDa PGE synthase 1