. "Forms ester groups with L-glutamate residues in a number of membrane proteins." . . . "Protein-glutamate O-methyltransferase" . "Methyl-accepting chemotaxis protein O-methyltransferase" . . "S-adenosyl-L-methionine + protein L-glutamate = S-adenosyl-L-homocysteine + protein L-glutamate methyl ester." .